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smb: client: cleanup smb2_query_reparse_point()
[thirdparty/linux.git] / fs / smb / client / smb2ops.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SMB2 version specific operations
4 *
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6 */
7
8 #include <linux/pagemap.h>
9 #include <linux/vfs.h>
10 #include <linux/falloc.h>
11 #include <linux/scatterlist.h>
12 #include <linux/uuid.h>
13 #include <linux/sort.h>
14 #include <crypto/aead.h>
15 #include <linux/fiemap.h>
16 #include <uapi/linux/magic.h>
17 #include "cifsfs.h"
18 #include "cifsglob.h"
19 #include "smb2pdu.h"
20 #include "smb2proto.h"
21 #include "cifsproto.h"
22 #include "cifs_debug.h"
23 #include "cifs_unicode.h"
24 #include "smb2status.h"
25 #include "smb2glob.h"
26 #include "cifs_ioctl.h"
27 #include "smbdirect.h"
28 #include "fscache.h"
29 #include "fs_context.h"
30 #include "cached_dir.h"
31
32 /* Change credits for different ops and return the total number of credits */
33 static int
34 change_conf(struct TCP_Server_Info *server)
35 {
36 server->credits += server->echo_credits + server->oplock_credits;
37 if (server->credits > server->max_credits)
38 server->credits = server->max_credits;
39 server->oplock_credits = server->echo_credits = 0;
40 switch (server->credits) {
41 case 0:
42 return 0;
43 case 1:
44 server->echoes = false;
45 server->oplocks = false;
46 break;
47 case 2:
48 server->echoes = true;
49 server->oplocks = false;
50 server->echo_credits = 1;
51 break;
52 default:
53 server->echoes = true;
54 if (enable_oplocks) {
55 server->oplocks = true;
56 server->oplock_credits = 1;
57 } else
58 server->oplocks = false;
59
60 server->echo_credits = 1;
61 }
62 server->credits -= server->echo_credits + server->oplock_credits;
63 return server->credits + server->echo_credits + server->oplock_credits;
64 }
65
66 static void
67 smb2_add_credits(struct TCP_Server_Info *server,
68 const struct cifs_credits *credits, const int optype)
69 {
70 int *val, rc = -1;
71 int scredits, in_flight;
72 unsigned int add = credits->value;
73 unsigned int instance = credits->instance;
74 bool reconnect_detected = false;
75 bool reconnect_with_invalid_credits = false;
76
77 spin_lock(&server->req_lock);
78 val = server->ops->get_credits_field(server, optype);
79
80 /* eg found case where write overlapping reconnect messed up credits */
81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
82 reconnect_with_invalid_credits = true;
83
84 if ((instance == 0) || (instance == server->reconnect_instance))
85 *val += add;
86 else
87 reconnect_detected = true;
88
89 if (*val > 65000) {
90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
91 pr_warn_once("server overflowed SMB3 credits\n");
92 trace_smb3_overflow_credits(server->CurrentMid,
93 server->conn_id, server->hostname, *val,
94 add, server->in_flight);
95 }
96 WARN_ON_ONCE(server->in_flight == 0);
97 server->in_flight--;
98 if (server->in_flight == 0 &&
99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
101 rc = change_conf(server);
102 /*
103 * Sometimes server returns 0 credits on oplock break ack - we need to
104 * rebalance credits in this case.
105 */
106 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
107 server->oplocks) {
108 if (server->credits > 1) {
109 server->credits--;
110 server->oplock_credits++;
111 }
112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
114 /* if now have too many oplock credits, rebalance so don't starve normal ops */
115 change_conf(server);
116
117 scredits = *val;
118 in_flight = server->in_flight;
119 spin_unlock(&server->req_lock);
120 wake_up(&server->request_q);
121
122 if (reconnect_detected) {
123 trace_smb3_reconnect_detected(server->CurrentMid,
124 server->conn_id, server->hostname, scredits, add, in_flight);
125
126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
127 add, instance);
128 }
129
130 if (reconnect_with_invalid_credits) {
131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
132 server->conn_id, server->hostname, scredits, add, in_flight);
133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
134 optype, scredits, add);
135 }
136
137 spin_lock(&server->srv_lock);
138 if (server->tcpStatus == CifsNeedReconnect
139 || server->tcpStatus == CifsExiting) {
140 spin_unlock(&server->srv_lock);
141 return;
142 }
143 spin_unlock(&server->srv_lock);
144
145 switch (rc) {
146 case -1:
147 /* change_conf hasn't been executed */
148 break;
149 case 0:
150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
151 break;
152 case 1:
153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
154 break;
155 case 2:
156 cifs_dbg(FYI, "disabling oplocks\n");
157 break;
158 default:
159 /* change_conf rebalanced credits for different types */
160 break;
161 }
162
163 trace_smb3_add_credits(server->CurrentMid,
164 server->conn_id, server->hostname, scredits, add, in_flight);
165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
166 }
167
168 static void
169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
170 {
171 int scredits, in_flight;
172
173 spin_lock(&server->req_lock);
174 server->credits = val;
175 if (val == 1) {
176 server->reconnect_instance++;
177 /*
178 * ChannelSequence updated for all channels in primary channel so that consistent
179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
180 */
181 if (SERVER_IS_CHAN(server))
182 server->primary_server->channel_sequence_num++;
183 else
184 server->channel_sequence_num++;
185 }
186 scredits = server->credits;
187 in_flight = server->in_flight;
188 spin_unlock(&server->req_lock);
189
190 trace_smb3_set_credits(server->CurrentMid,
191 server->conn_id, server->hostname, scredits, val, in_flight);
192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
193
194 /* don't log while holding the lock */
195 if (val == 1)
196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
197 }
198
199 static int *
200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
201 {
202 switch (optype) {
203 case CIFS_ECHO_OP:
204 return &server->echo_credits;
205 case CIFS_OBREAK_OP:
206 return &server->oplock_credits;
207 default:
208 return &server->credits;
209 }
210 }
211
212 static unsigned int
213 smb2_get_credits(struct mid_q_entry *mid)
214 {
215 return mid->credits_received;
216 }
217
218 static int
219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
220 unsigned int *num, struct cifs_credits *credits)
221 {
222 int rc = 0;
223 unsigned int scredits, in_flight;
224
225 spin_lock(&server->req_lock);
226 while (1) {
227 spin_unlock(&server->req_lock);
228
229 spin_lock(&server->srv_lock);
230 if (server->tcpStatus == CifsExiting) {
231 spin_unlock(&server->srv_lock);
232 return -ENOENT;
233 }
234 spin_unlock(&server->srv_lock);
235
236 spin_lock(&server->req_lock);
237 if (server->credits <= 0) {
238 spin_unlock(&server->req_lock);
239 cifs_num_waiters_inc(server);
240 rc = wait_event_killable(server->request_q,
241 has_credits(server, &server->credits, 1));
242 cifs_num_waiters_dec(server);
243 if (rc)
244 return rc;
245 spin_lock(&server->req_lock);
246 } else {
247 scredits = server->credits;
248 /* can deadlock with reopen */
249 if (scredits <= 8) {
250 *num = SMB2_MAX_BUFFER_SIZE;
251 credits->value = 0;
252 credits->instance = 0;
253 break;
254 }
255
256 /* leave some credits for reopen and other ops */
257 scredits -= 8;
258 *num = min_t(unsigned int, size,
259 scredits * SMB2_MAX_BUFFER_SIZE);
260
261 credits->value =
262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
263 credits->instance = server->reconnect_instance;
264 server->credits -= credits->value;
265 server->in_flight++;
266 if (server->in_flight > server->max_in_flight)
267 server->max_in_flight = server->in_flight;
268 break;
269 }
270 }
271 scredits = server->credits;
272 in_flight = server->in_flight;
273 spin_unlock(&server->req_lock);
274
275 trace_smb3_wait_credits(server->CurrentMid,
276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
278 __func__, credits->value, scredits);
279
280 return rc;
281 }
282
283 static int
284 smb2_adjust_credits(struct TCP_Server_Info *server,
285 struct cifs_credits *credits,
286 const unsigned int payload_size)
287 {
288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
289 int scredits, in_flight;
290
291 if (!credits->value || credits->value == new_val)
292 return 0;
293
294 if (credits->value < new_val) {
295 trace_smb3_too_many_credits(server->CurrentMid,
296 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
298 credits->value, new_val);
299
300 return -EOPNOTSUPP;
301 }
302
303 spin_lock(&server->req_lock);
304
305 if (server->reconnect_instance != credits->instance) {
306 scredits = server->credits;
307 in_flight = server->in_flight;
308 spin_unlock(&server->req_lock);
309
310 trace_smb3_reconnect_detected(server->CurrentMid,
311 server->conn_id, server->hostname, scredits,
312 credits->value - new_val, in_flight);
313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
314 credits->value - new_val);
315 return -EAGAIN;
316 }
317
318 server->credits += credits->value - new_val;
319 scredits = server->credits;
320 in_flight = server->in_flight;
321 spin_unlock(&server->req_lock);
322 wake_up(&server->request_q);
323
324 trace_smb3_adj_credits(server->CurrentMid,
325 server->conn_id, server->hostname, scredits,
326 credits->value - new_val, in_flight);
327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
328 __func__, credits->value - new_val, scredits);
329
330 credits->value = new_val;
331
332 return 0;
333 }
334
335 static __u64
336 smb2_get_next_mid(struct TCP_Server_Info *server)
337 {
338 __u64 mid;
339 /* for SMB2 we need the current value */
340 spin_lock(&server->mid_lock);
341 mid = server->CurrentMid++;
342 spin_unlock(&server->mid_lock);
343 return mid;
344 }
345
346 static void
347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
348 {
349 spin_lock(&server->mid_lock);
350 if (server->CurrentMid >= val)
351 server->CurrentMid -= val;
352 spin_unlock(&server->mid_lock);
353 }
354
355 static struct mid_q_entry *
356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
357 {
358 struct mid_q_entry *mid;
359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
360 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
361
362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
364 return NULL;
365 }
366
367 spin_lock(&server->mid_lock);
368 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
369 if ((mid->mid == wire_mid) &&
370 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
371 (mid->command == shdr->Command)) {
372 kref_get(&mid->refcount);
373 if (dequeue) {
374 list_del_init(&mid->qhead);
375 mid->mid_flags |= MID_DELETED;
376 }
377 spin_unlock(&server->mid_lock);
378 return mid;
379 }
380 }
381 spin_unlock(&server->mid_lock);
382 return NULL;
383 }
384
385 static struct mid_q_entry *
386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
387 {
388 return __smb2_find_mid(server, buf, false);
389 }
390
391 static struct mid_q_entry *
392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
393 {
394 return __smb2_find_mid(server, buf, true);
395 }
396
397 static void
398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
399 {
400 #ifdef CONFIG_CIFS_DEBUG2
401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
402
403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
405 shdr->Id.SyncId.ProcessId);
406 if (!server->ops->check_message(buf, server->total_read, server)) {
407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
408 server->ops->calc_smb_size(buf));
409 }
410 #endif
411 }
412
413 static bool
414 smb2_need_neg(struct TCP_Server_Info *server)
415 {
416 return server->max_read == 0;
417 }
418
419 static int
420 smb2_negotiate(const unsigned int xid,
421 struct cifs_ses *ses,
422 struct TCP_Server_Info *server)
423 {
424 int rc;
425
426 spin_lock(&server->mid_lock);
427 server->CurrentMid = 0;
428 spin_unlock(&server->mid_lock);
429 rc = SMB2_negotiate(xid, ses, server);
430 /* BB we probably don't need to retry with modern servers */
431 if (rc == -EAGAIN)
432 rc = -EHOSTDOWN;
433 return rc;
434 }
435
436 static unsigned int
437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
438 {
439 struct TCP_Server_Info *server = tcon->ses->server;
440 unsigned int wsize;
441
442 /* start with specified wsize, or default */
443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
444 wsize = min_t(unsigned int, wsize, server->max_write);
445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
447
448 return wsize;
449 }
450
451 static unsigned int
452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
453 {
454 struct TCP_Server_Info *server = tcon->ses->server;
455 unsigned int wsize;
456
457 /* start with specified wsize, or default */
458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
459 wsize = min_t(unsigned int, wsize, server->max_write);
460 #ifdef CONFIG_CIFS_SMB_DIRECT
461 if (server->rdma) {
462 if (server->sign)
463 /*
464 * Account for SMB2 data transfer packet header and
465 * possible encryption header
466 */
467 wsize = min_t(unsigned int,
468 wsize,
469 server->smbd_conn->max_fragmented_send_size -
470 SMB2_READWRITE_PDU_HEADER_SIZE -
471 sizeof(struct smb2_transform_hdr));
472 else
473 wsize = min_t(unsigned int,
474 wsize, server->smbd_conn->max_readwrite_size);
475 }
476 #endif
477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
479
480 return wsize;
481 }
482
483 static unsigned int
484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
485 {
486 struct TCP_Server_Info *server = tcon->ses->server;
487 unsigned int rsize;
488
489 /* start with specified rsize, or default */
490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
491 rsize = min_t(unsigned int, rsize, server->max_read);
492
493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
495
496 return rsize;
497 }
498
499 static unsigned int
500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
501 {
502 struct TCP_Server_Info *server = tcon->ses->server;
503 unsigned int rsize;
504
505 /* start with specified rsize, or default */
506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
507 rsize = min_t(unsigned int, rsize, server->max_read);
508 #ifdef CONFIG_CIFS_SMB_DIRECT
509 if (server->rdma) {
510 if (server->sign)
511 /*
512 * Account for SMB2 data transfer packet header and
513 * possible encryption header
514 */
515 rsize = min_t(unsigned int,
516 rsize,
517 server->smbd_conn->max_fragmented_recv_size -
518 SMB2_READWRITE_PDU_HEADER_SIZE -
519 sizeof(struct smb2_transform_hdr));
520 else
521 rsize = min_t(unsigned int,
522 rsize, server->smbd_conn->max_readwrite_size);
523 }
524 #endif
525
526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
528
529 return rsize;
530 }
531
532 /*
533 * compare two interfaces a and b
534 * return 0 if everything matches.
535 * return 1 if a is rdma capable, or rss capable, or has higher link speed
536 * return -1 otherwise.
537 */
538 static int
539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
540 {
541 int cmp_ret = 0;
542
543 WARN_ON(!a || !b);
544 if (a->rdma_capable == b->rdma_capable) {
545 if (a->rss_capable == b->rss_capable) {
546 if (a->speed == b->speed) {
547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
548 (struct sockaddr *) &b->sockaddr);
549 if (!cmp_ret)
550 return 0;
551 else if (cmp_ret > 0)
552 return 1;
553 else
554 return -1;
555 } else if (a->speed > b->speed)
556 return 1;
557 else
558 return -1;
559 } else if (a->rss_capable > b->rss_capable)
560 return 1;
561 else
562 return -1;
563 } else if (a->rdma_capable > b->rdma_capable)
564 return 1;
565 else
566 return -1;
567 }
568
569 static int
570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
571 size_t buf_len, struct cifs_ses *ses, bool in_mount)
572 {
573 struct network_interface_info_ioctl_rsp *p;
574 struct sockaddr_in *addr4;
575 struct sockaddr_in6 *addr6;
576 struct iface_info_ipv4 *p4;
577 struct iface_info_ipv6 *p6;
578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
579 struct cifs_server_iface tmp_iface;
580 ssize_t bytes_left;
581 size_t next = 0;
582 int nb_iface = 0;
583 int rc = 0, ret = 0;
584
585 bytes_left = buf_len;
586 p = buf;
587
588 spin_lock(&ses->iface_lock);
589 /* do not query too frequently, this time with lock held */
590 if (ses->iface_last_update &&
591 time_before(jiffies, ses->iface_last_update +
592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
593 spin_unlock(&ses->iface_lock);
594 return 0;
595 }
596
597 /*
598 * Go through iface_list and mark them as inactive
599 */
600 list_for_each_entry_safe(iface, niface, &ses->iface_list,
601 iface_head)
602 iface->is_active = 0;
603
604 spin_unlock(&ses->iface_lock);
605
606 /*
607 * Samba server e.g. can return an empty interface list in some cases,
608 * which would only be a problem if we were requesting multichannel
609 */
610 if (bytes_left == 0) {
611 /* avoid spamming logs every 10 minutes, so log only in mount */
612 if ((ses->chan_max > 1) && in_mount)
613 cifs_dbg(VFS,
614 "multichannel not available\n"
615 "Empty network interface list returned by server %s\n",
616 ses->server->hostname);
617 rc = -EINVAL;
618 goto out;
619 }
620
621 while (bytes_left >= sizeof(*p)) {
622 memset(&tmp_iface, 0, sizeof(tmp_iface));
623 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
624 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
625 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
626
627 switch (p->Family) {
628 /*
629 * The kernel and wire socket structures have the same
630 * layout and use network byte order but make the
631 * conversion explicit in case either one changes.
632 */
633 case INTERNETWORK:
634 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
635 p4 = (struct iface_info_ipv4 *)p->Buffer;
636 addr4->sin_family = AF_INET;
637 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
638
639 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
640 addr4->sin_port = cpu_to_be16(CIFS_PORT);
641
642 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
643 &addr4->sin_addr);
644 break;
645 case INTERNETWORKV6:
646 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
647 p6 = (struct iface_info_ipv6 *)p->Buffer;
648 addr6->sin6_family = AF_INET6;
649 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
650
651 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
652 addr6->sin6_flowinfo = 0;
653 addr6->sin6_scope_id = 0;
654 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
655
656 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
657 &addr6->sin6_addr);
658 break;
659 default:
660 cifs_dbg(VFS,
661 "%s: skipping unsupported socket family\n",
662 __func__);
663 goto next_iface;
664 }
665
666 /*
667 * The iface_list is assumed to be sorted by speed.
668 * Check if the new interface exists in that list.
669 * NEVER change iface. it could be in use.
670 * Add a new one instead
671 */
672 spin_lock(&ses->iface_lock);
673 list_for_each_entry_safe(iface, niface, &ses->iface_list,
674 iface_head) {
675 ret = iface_cmp(iface, &tmp_iface);
676 if (!ret) {
677 iface->is_active = 1;
678 spin_unlock(&ses->iface_lock);
679 goto next_iface;
680 } else if (ret < 0) {
681 /* all remaining ifaces are slower */
682 kref_get(&iface->refcount);
683 break;
684 }
685 }
686 spin_unlock(&ses->iface_lock);
687
688 /* no match. insert the entry in the list */
689 info = kmalloc(sizeof(struct cifs_server_iface),
690 GFP_KERNEL);
691 if (!info) {
692 rc = -ENOMEM;
693 goto out;
694 }
695 memcpy(info, &tmp_iface, sizeof(tmp_iface));
696
697 /* add this new entry to the list */
698 kref_init(&info->refcount);
699 info->is_active = 1;
700
701 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
702 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
703 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
704 le32_to_cpu(p->Capability));
705
706 spin_lock(&ses->iface_lock);
707 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
708 list_add_tail(&info->iface_head, &iface->iface_head);
709 kref_put(&iface->refcount, release_iface);
710 } else
711 list_add_tail(&info->iface_head, &ses->iface_list);
712
713 ses->iface_count++;
714 spin_unlock(&ses->iface_lock);
715 ses->iface_last_update = jiffies;
716 next_iface:
717 nb_iface++;
718 next = le32_to_cpu(p->Next);
719 if (!next) {
720 bytes_left -= sizeof(*p);
721 break;
722 }
723 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
724 bytes_left -= next;
725 }
726
727 if (!nb_iface) {
728 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
729 rc = -EINVAL;
730 goto out;
731 }
732
733 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
734 if ((bytes_left > 8) || p->Next)
735 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
736
737
738 if (!ses->iface_count) {
739 rc = -EINVAL;
740 goto out;
741 }
742
743 out:
744 /*
745 * Go through the list again and put the inactive entries
746 */
747 spin_lock(&ses->iface_lock);
748 list_for_each_entry_safe(iface, niface, &ses->iface_list,
749 iface_head) {
750 if (!iface->is_active) {
751 list_del(&iface->iface_head);
752 kref_put(&iface->refcount, release_iface);
753 ses->iface_count--;
754 }
755 }
756 spin_unlock(&ses->iface_lock);
757
758 return rc;
759 }
760
761 int
762 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
763 {
764 int rc;
765 unsigned int ret_data_len = 0;
766 struct network_interface_info_ioctl_rsp *out_buf = NULL;
767 struct cifs_ses *ses = tcon->ses;
768 struct TCP_Server_Info *pserver;
769
770 /* do not query too frequently */
771 if (ses->iface_last_update &&
772 time_before(jiffies, ses->iface_last_update +
773 (SMB_INTERFACE_POLL_INTERVAL * HZ)))
774 return 0;
775
776 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
777 FSCTL_QUERY_NETWORK_INTERFACE_INFO,
778 NULL /* no data input */, 0 /* no data input */,
779 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
780 if (rc == -EOPNOTSUPP) {
781 cifs_dbg(FYI,
782 "server does not support query network interfaces\n");
783 ret_data_len = 0;
784 } else if (rc != 0) {
785 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
786 goto out;
787 }
788
789 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
790 if (rc)
791 goto out;
792
793 /* check if iface is still active */
794 spin_lock(&ses->chan_lock);
795 pserver = ses->chans[0].server;
796 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
797 spin_unlock(&ses->chan_lock);
798 cifs_chan_update_iface(ses, pserver);
799 spin_lock(&ses->chan_lock);
800 }
801 spin_unlock(&ses->chan_lock);
802
803 out:
804 kfree(out_buf);
805 return rc;
806 }
807
808 static void
809 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
810 struct cifs_sb_info *cifs_sb)
811 {
812 int rc;
813 __le16 srch_path = 0; /* Null - open root of share */
814 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
815 struct cifs_open_parms oparms;
816 struct cifs_fid fid;
817 struct cached_fid *cfid = NULL;
818
819 oparms = (struct cifs_open_parms) {
820 .tcon = tcon,
821 .path = "",
822 .desired_access = FILE_READ_ATTRIBUTES,
823 .disposition = FILE_OPEN,
824 .create_options = cifs_create_options(cifs_sb, 0),
825 .fid = &fid,
826 };
827
828 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
829 if (rc == 0)
830 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
831 else
832 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
833 NULL, NULL);
834 if (rc)
835 return;
836
837 SMB3_request_interfaces(xid, tcon, true /* called during mount */);
838
839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
840 FS_ATTRIBUTE_INFORMATION);
841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
842 FS_DEVICE_INFORMATION);
843 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
844 FS_VOLUME_INFORMATION);
845 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
846 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
847 if (cfid == NULL)
848 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
849 else
850 close_cached_dir(cfid);
851 }
852
853 static void
854 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
855 struct cifs_sb_info *cifs_sb)
856 {
857 int rc;
858 __le16 srch_path = 0; /* Null - open root of share */
859 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
860 struct cifs_open_parms oparms;
861 struct cifs_fid fid;
862
863 oparms = (struct cifs_open_parms) {
864 .tcon = tcon,
865 .path = "",
866 .desired_access = FILE_READ_ATTRIBUTES,
867 .disposition = FILE_OPEN,
868 .create_options = cifs_create_options(cifs_sb, 0),
869 .fid = &fid,
870 };
871
872 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
873 NULL, NULL);
874 if (rc)
875 return;
876
877 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
878 FS_ATTRIBUTE_INFORMATION);
879 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
880 FS_DEVICE_INFORMATION);
881 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
882 }
883
884 static int
885 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
886 struct cifs_sb_info *cifs_sb, const char *full_path)
887 {
888 __le16 *utf16_path;
889 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
890 int err_buftype = CIFS_NO_BUFFER;
891 struct cifs_open_parms oparms;
892 struct kvec err_iov = {};
893 struct cifs_fid fid;
894 struct cached_fid *cfid;
895 bool islink;
896 int rc, rc2;
897
898 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
899 if (!rc) {
900 if (cfid->has_lease) {
901 close_cached_dir(cfid);
902 return 0;
903 }
904 close_cached_dir(cfid);
905 }
906
907 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
908 if (!utf16_path)
909 return -ENOMEM;
910
911 oparms = (struct cifs_open_parms) {
912 .tcon = tcon,
913 .path = full_path,
914 .desired_access = FILE_READ_ATTRIBUTES,
915 .disposition = FILE_OPEN,
916 .create_options = cifs_create_options(cifs_sb, 0),
917 .fid = &fid,
918 };
919
920 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
921 &err_iov, &err_buftype);
922 if (rc) {
923 struct smb2_hdr *hdr = err_iov.iov_base;
924
925 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
926 goto out;
927
928 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
929 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
930 full_path, &islink);
931 if (rc2) {
932 rc = rc2;
933 goto out;
934 }
935 if (islink)
936 rc = -EREMOTE;
937 }
938 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
939 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
940 rc = -EOPNOTSUPP;
941 goto out;
942 }
943
944 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
945
946 out:
947 free_rsp_buf(err_buftype, err_iov.iov_base);
948 kfree(utf16_path);
949 return rc;
950 }
951
952 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
953 struct cifs_sb_info *cifs_sb, const char *full_path,
954 u64 *uniqueid, struct cifs_open_info_data *data)
955 {
956 *uniqueid = le64_to_cpu(data->fi.IndexNumber);
957 return 0;
958 }
959
960 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
961 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
962 {
963 struct cifs_fid *fid = &cfile->fid;
964
965 if (cfile->symlink_target) {
966 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
967 if (!data->symlink_target)
968 return -ENOMEM;
969 }
970 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
971 }
972
973 #ifdef CONFIG_CIFS_XATTR
974 static ssize_t
975 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
976 struct smb2_file_full_ea_info *src, size_t src_size,
977 const unsigned char *ea_name)
978 {
979 int rc = 0;
980 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
981 char *name, *value;
982 size_t buf_size = dst_size;
983 size_t name_len, value_len, user_name_len;
984
985 while (src_size > 0) {
986 name_len = (size_t)src->ea_name_length;
987 value_len = (size_t)le16_to_cpu(src->ea_value_length);
988
989 if (name_len == 0)
990 break;
991
992 if (src_size < 8 + name_len + 1 + value_len) {
993 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
994 rc = -EIO;
995 goto out;
996 }
997
998 name = &src->ea_data[0];
999 value = &src->ea_data[src->ea_name_length + 1];
1000
1001 if (ea_name) {
1002 if (ea_name_len == name_len &&
1003 memcmp(ea_name, name, name_len) == 0) {
1004 rc = value_len;
1005 if (dst_size == 0)
1006 goto out;
1007 if (dst_size < value_len) {
1008 rc = -ERANGE;
1009 goto out;
1010 }
1011 memcpy(dst, value, value_len);
1012 goto out;
1013 }
1014 } else {
1015 /* 'user.' plus a terminating null */
1016 user_name_len = 5 + 1 + name_len;
1017
1018 if (buf_size == 0) {
1019 /* skip copy - calc size only */
1020 rc += user_name_len;
1021 } else if (dst_size >= user_name_len) {
1022 dst_size -= user_name_len;
1023 memcpy(dst, "user.", 5);
1024 dst += 5;
1025 memcpy(dst, src->ea_data, name_len);
1026 dst += name_len;
1027 *dst = 0;
1028 ++dst;
1029 rc += user_name_len;
1030 } else {
1031 /* stop before overrun buffer */
1032 rc = -ERANGE;
1033 break;
1034 }
1035 }
1036
1037 if (!src->next_entry_offset)
1038 break;
1039
1040 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1041 /* stop before overrun buffer */
1042 rc = -ERANGE;
1043 break;
1044 }
1045 src_size -= le32_to_cpu(src->next_entry_offset);
1046 src = (void *)((char *)src +
1047 le32_to_cpu(src->next_entry_offset));
1048 }
1049
1050 /* didn't find the named attribute */
1051 if (ea_name)
1052 rc = -ENODATA;
1053
1054 out:
1055 return (ssize_t)rc;
1056 }
1057
1058 static ssize_t
1059 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1060 const unsigned char *path, const unsigned char *ea_name,
1061 char *ea_data, size_t buf_size,
1062 struct cifs_sb_info *cifs_sb)
1063 {
1064 int rc;
1065 struct kvec rsp_iov = {NULL, 0};
1066 int buftype = CIFS_NO_BUFFER;
1067 struct smb2_query_info_rsp *rsp;
1068 struct smb2_file_full_ea_info *info = NULL;
1069
1070 rc = smb2_query_info_compound(xid, tcon, path,
1071 FILE_READ_EA,
1072 FILE_FULL_EA_INFORMATION,
1073 SMB2_O_INFO_FILE,
1074 CIFSMaxBufSize -
1075 MAX_SMB2_CREATE_RESPONSE_SIZE -
1076 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1077 &rsp_iov, &buftype, cifs_sb);
1078 if (rc) {
1079 /*
1080 * If ea_name is NULL (listxattr) and there are no EAs,
1081 * return 0 as it's not an error. Otherwise, the specified
1082 * ea_name was not found.
1083 */
1084 if (!ea_name && rc == -ENODATA)
1085 rc = 0;
1086 goto qeas_exit;
1087 }
1088
1089 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1090 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1091 le32_to_cpu(rsp->OutputBufferLength),
1092 &rsp_iov,
1093 sizeof(struct smb2_file_full_ea_info));
1094 if (rc)
1095 goto qeas_exit;
1096
1097 info = (struct smb2_file_full_ea_info *)(
1098 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1099 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1100 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1101
1102 qeas_exit:
1103 free_rsp_buf(buftype, rsp_iov.iov_base);
1104 return rc;
1105 }
1106
1107 static int
1108 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1109 const char *path, const char *ea_name, const void *ea_value,
1110 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1111 struct cifs_sb_info *cifs_sb)
1112 {
1113 struct smb2_compound_vars *vars;
1114 struct cifs_ses *ses = tcon->ses;
1115 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1116 struct smb_rqst *rqst;
1117 struct kvec *rsp_iov;
1118 __le16 *utf16_path = NULL;
1119 int ea_name_len = strlen(ea_name);
1120 int flags = CIFS_CP_CREATE_CLOSE_OP;
1121 int len;
1122 int resp_buftype[3];
1123 struct cifs_open_parms oparms;
1124 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1125 struct cifs_fid fid;
1126 unsigned int size[1];
1127 void *data[1];
1128 struct smb2_file_full_ea_info *ea = NULL;
1129 struct smb2_query_info_rsp *rsp;
1130 int rc, used_len = 0;
1131
1132 if (smb3_encryption_required(tcon))
1133 flags |= CIFS_TRANSFORM_REQ;
1134
1135 if (ea_name_len > 255)
1136 return -EINVAL;
1137
1138 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1139 if (!utf16_path)
1140 return -ENOMEM;
1141
1142 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1143 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1144 if (!vars) {
1145 rc = -ENOMEM;
1146 goto out_free_path;
1147 }
1148 rqst = vars->rqst;
1149 rsp_iov = vars->rsp_iov;
1150
1151 if (ses->server->ops->query_all_EAs) {
1152 if (!ea_value) {
1153 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1154 ea_name, NULL, 0,
1155 cifs_sb);
1156 if (rc == -ENODATA)
1157 goto sea_exit;
1158 } else {
1159 /* If we are adding a attribute we should first check
1160 * if there will be enough space available to store
1161 * the new EA. If not we should not add it since we
1162 * would not be able to even read the EAs back.
1163 */
1164 rc = smb2_query_info_compound(xid, tcon, path,
1165 FILE_READ_EA,
1166 FILE_FULL_EA_INFORMATION,
1167 SMB2_O_INFO_FILE,
1168 CIFSMaxBufSize -
1169 MAX_SMB2_CREATE_RESPONSE_SIZE -
1170 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1171 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1172 if (rc == 0) {
1173 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1174 used_len = le32_to_cpu(rsp->OutputBufferLength);
1175 }
1176 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1177 resp_buftype[1] = CIFS_NO_BUFFER;
1178 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1179 rc = 0;
1180
1181 /* Use a fudge factor of 256 bytes in case we collide
1182 * with a different set_EAs command.
1183 */
1184 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1185 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1186 used_len + ea_name_len + ea_value_len + 1) {
1187 rc = -ENOSPC;
1188 goto sea_exit;
1189 }
1190 }
1191 }
1192
1193 /* Open */
1194 rqst[0].rq_iov = vars->open_iov;
1195 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1196
1197 oparms = (struct cifs_open_parms) {
1198 .tcon = tcon,
1199 .path = path,
1200 .desired_access = FILE_WRITE_EA,
1201 .disposition = FILE_OPEN,
1202 .create_options = cifs_create_options(cifs_sb, 0),
1203 .fid = &fid,
1204 };
1205
1206 rc = SMB2_open_init(tcon, server,
1207 &rqst[0], &oplock, &oparms, utf16_path);
1208 if (rc)
1209 goto sea_exit;
1210 smb2_set_next_command(tcon, &rqst[0]);
1211
1212
1213 /* Set Info */
1214 rqst[1].rq_iov = vars->si_iov;
1215 rqst[1].rq_nvec = 1;
1216
1217 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1218 ea = kzalloc(len, GFP_KERNEL);
1219 if (ea == NULL) {
1220 rc = -ENOMEM;
1221 goto sea_exit;
1222 }
1223
1224 ea->ea_name_length = ea_name_len;
1225 ea->ea_value_length = cpu_to_le16(ea_value_len);
1226 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1227 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1228
1229 size[0] = len;
1230 data[0] = ea;
1231
1232 rc = SMB2_set_info_init(tcon, server,
1233 &rqst[1], COMPOUND_FID,
1234 COMPOUND_FID, current->tgid,
1235 FILE_FULL_EA_INFORMATION,
1236 SMB2_O_INFO_FILE, 0, data, size);
1237 if (rc)
1238 goto sea_exit;
1239 smb2_set_next_command(tcon, &rqst[1]);
1240 smb2_set_related(&rqst[1]);
1241
1242 /* Close */
1243 rqst[2].rq_iov = &vars->close_iov;
1244 rqst[2].rq_nvec = 1;
1245 rc = SMB2_close_init(tcon, server,
1246 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1247 if (rc)
1248 goto sea_exit;
1249 smb2_set_related(&rqst[2]);
1250
1251 rc = compound_send_recv(xid, ses, server,
1252 flags, 3, rqst,
1253 resp_buftype, rsp_iov);
1254 /* no need to bump num_remote_opens because handle immediately closed */
1255
1256 sea_exit:
1257 kfree(ea);
1258 SMB2_open_free(&rqst[0]);
1259 SMB2_set_info_free(&rqst[1]);
1260 SMB2_close_free(&rqst[2]);
1261 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1262 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1263 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1264 kfree(vars);
1265 out_free_path:
1266 kfree(utf16_path);
1267 return rc;
1268 }
1269 #endif
1270
1271 static bool
1272 smb2_can_echo(struct TCP_Server_Info *server)
1273 {
1274 return server->echoes;
1275 }
1276
1277 static void
1278 smb2_clear_stats(struct cifs_tcon *tcon)
1279 {
1280 int i;
1281
1282 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1283 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1284 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1285 }
1286 }
1287
1288 static void
1289 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1290 {
1291 seq_puts(m, "\n\tShare Capabilities:");
1292 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1293 seq_puts(m, " DFS,");
1294 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1295 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1296 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1297 seq_puts(m, " SCALEOUT,");
1298 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1299 seq_puts(m, " CLUSTER,");
1300 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1301 seq_puts(m, " ASYMMETRIC,");
1302 if (tcon->capabilities == 0)
1303 seq_puts(m, " None");
1304 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1305 seq_puts(m, " Aligned,");
1306 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1307 seq_puts(m, " Partition Aligned,");
1308 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1309 seq_puts(m, " SSD,");
1310 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1311 seq_puts(m, " TRIM-support,");
1312
1313 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1314 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1315 if (tcon->perf_sector_size)
1316 seq_printf(m, "\tOptimal sector size: 0x%x",
1317 tcon->perf_sector_size);
1318 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1319 }
1320
1321 static void
1322 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1323 {
1324 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1325 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1326
1327 /*
1328 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1329 * totals (requests sent) since those SMBs are per-session not per tcon
1330 */
1331 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1332 (long long)(tcon->bytes_read),
1333 (long long)(tcon->bytes_written));
1334 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1335 atomic_read(&tcon->num_local_opens),
1336 atomic_read(&tcon->num_remote_opens));
1337 seq_printf(m, "\nTreeConnects: %d total %d failed",
1338 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1339 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1340 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1341 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1342 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1343 seq_printf(m, "\nCreates: %d total %d failed",
1344 atomic_read(&sent[SMB2_CREATE_HE]),
1345 atomic_read(&failed[SMB2_CREATE_HE]));
1346 seq_printf(m, "\nCloses: %d total %d failed",
1347 atomic_read(&sent[SMB2_CLOSE_HE]),
1348 atomic_read(&failed[SMB2_CLOSE_HE]));
1349 seq_printf(m, "\nFlushes: %d total %d failed",
1350 atomic_read(&sent[SMB2_FLUSH_HE]),
1351 atomic_read(&failed[SMB2_FLUSH_HE]));
1352 seq_printf(m, "\nReads: %d total %d failed",
1353 atomic_read(&sent[SMB2_READ_HE]),
1354 atomic_read(&failed[SMB2_READ_HE]));
1355 seq_printf(m, "\nWrites: %d total %d failed",
1356 atomic_read(&sent[SMB2_WRITE_HE]),
1357 atomic_read(&failed[SMB2_WRITE_HE]));
1358 seq_printf(m, "\nLocks: %d total %d failed",
1359 atomic_read(&sent[SMB2_LOCK_HE]),
1360 atomic_read(&failed[SMB2_LOCK_HE]));
1361 seq_printf(m, "\nIOCTLs: %d total %d failed",
1362 atomic_read(&sent[SMB2_IOCTL_HE]),
1363 atomic_read(&failed[SMB2_IOCTL_HE]));
1364 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1365 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1366 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1367 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1368 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1369 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1370 seq_printf(m, "\nQueryInfos: %d total %d failed",
1371 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1372 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1373 seq_printf(m, "\nSetInfos: %d total %d failed",
1374 atomic_read(&sent[SMB2_SET_INFO_HE]),
1375 atomic_read(&failed[SMB2_SET_INFO_HE]));
1376 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1377 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1378 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1379 }
1380
1381 static void
1382 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1383 {
1384 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1385 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1386
1387 cfile->fid.persistent_fid = fid->persistent_fid;
1388 cfile->fid.volatile_fid = fid->volatile_fid;
1389 cfile->fid.access = fid->access;
1390 #ifdef CONFIG_CIFS_DEBUG2
1391 cfile->fid.mid = fid->mid;
1392 #endif /* CIFS_DEBUG2 */
1393 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1394 &fid->purge_cache);
1395 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1396 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1397 }
1398
1399 static void
1400 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1401 struct cifs_fid *fid)
1402 {
1403 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1404 }
1405
1406 static void
1407 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1408 struct cifsFileInfo *cfile)
1409 {
1410 struct smb2_file_network_open_info file_inf;
1411 struct inode *inode;
1412 int rc;
1413
1414 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1415 cfile->fid.volatile_fid, &file_inf);
1416 if (rc)
1417 return;
1418
1419 inode = d_inode(cfile->dentry);
1420
1421 spin_lock(&inode->i_lock);
1422 CIFS_I(inode)->time = jiffies;
1423
1424 /* Creation time should not need to be updated on close */
1425 if (file_inf.LastWriteTime)
1426 inode_set_mtime_to_ts(inode,
1427 cifs_NTtimeToUnix(file_inf.LastWriteTime));
1428 if (file_inf.ChangeTime)
1429 inode_set_ctime_to_ts(inode,
1430 cifs_NTtimeToUnix(file_inf.ChangeTime));
1431 if (file_inf.LastAccessTime)
1432 inode_set_atime_to_ts(inode,
1433 cifs_NTtimeToUnix(file_inf.LastAccessTime));
1434
1435 /*
1436 * i_blocks is not related to (i_size / i_blksize),
1437 * but instead 512 byte (2**9) size is required for
1438 * calculating num blocks.
1439 */
1440 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1441 inode->i_blocks =
1442 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1443
1444 /* End of file and Attributes should not have to be updated on close */
1445 spin_unlock(&inode->i_lock);
1446 }
1447
1448 static int
1449 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1450 u64 persistent_fid, u64 volatile_fid,
1451 struct copychunk_ioctl *pcchunk)
1452 {
1453 int rc;
1454 unsigned int ret_data_len;
1455 struct resume_key_req *res_key;
1456
1457 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1458 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1459 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1460
1461 if (rc == -EOPNOTSUPP) {
1462 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1463 goto req_res_key_exit;
1464 } else if (rc) {
1465 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1466 goto req_res_key_exit;
1467 }
1468 if (ret_data_len < sizeof(struct resume_key_req)) {
1469 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1470 rc = -EINVAL;
1471 goto req_res_key_exit;
1472 }
1473 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1474
1475 req_res_key_exit:
1476 kfree(res_key);
1477 return rc;
1478 }
1479
1480 static int
1481 smb2_ioctl_query_info(const unsigned int xid,
1482 struct cifs_tcon *tcon,
1483 struct cifs_sb_info *cifs_sb,
1484 __le16 *path, int is_dir,
1485 unsigned long p)
1486 {
1487 struct smb2_compound_vars *vars;
1488 struct smb_rqst *rqst;
1489 struct kvec *rsp_iov;
1490 struct cifs_ses *ses = tcon->ses;
1491 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1492 char __user *arg = (char __user *)p;
1493 struct smb_query_info qi;
1494 struct smb_query_info __user *pqi;
1495 int rc = 0;
1496 int flags = CIFS_CP_CREATE_CLOSE_OP;
1497 struct smb2_query_info_rsp *qi_rsp = NULL;
1498 struct smb2_ioctl_rsp *io_rsp = NULL;
1499 void *buffer = NULL;
1500 int resp_buftype[3];
1501 struct cifs_open_parms oparms;
1502 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1503 struct cifs_fid fid;
1504 unsigned int size[2];
1505 void *data[2];
1506 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1507 void (*free_req1_func)(struct smb_rqst *r);
1508
1509 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1510 if (vars == NULL)
1511 return -ENOMEM;
1512 rqst = &vars->rqst[0];
1513 rsp_iov = &vars->rsp_iov[0];
1514
1515 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1516
1517 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1518 rc = -EFAULT;
1519 goto free_vars;
1520 }
1521 if (qi.output_buffer_length > 1024) {
1522 rc = -EINVAL;
1523 goto free_vars;
1524 }
1525
1526 if (!ses || !server) {
1527 rc = -EIO;
1528 goto free_vars;
1529 }
1530
1531 if (smb3_encryption_required(tcon))
1532 flags |= CIFS_TRANSFORM_REQ;
1533
1534 if (qi.output_buffer_length) {
1535 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1536 if (IS_ERR(buffer)) {
1537 rc = PTR_ERR(buffer);
1538 goto free_vars;
1539 }
1540 }
1541
1542 /* Open */
1543 rqst[0].rq_iov = &vars->open_iov[0];
1544 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1545
1546 oparms = (struct cifs_open_parms) {
1547 .tcon = tcon,
1548 .disposition = FILE_OPEN,
1549 .create_options = cifs_create_options(cifs_sb, create_options),
1550 .fid = &fid,
1551 };
1552
1553 if (qi.flags & PASSTHRU_FSCTL) {
1554 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1555 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1556 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1557 break;
1558 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1559 oparms.desired_access = GENERIC_ALL;
1560 break;
1561 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1562 oparms.desired_access = GENERIC_READ;
1563 break;
1564 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1565 oparms.desired_access = GENERIC_WRITE;
1566 break;
1567 }
1568 } else if (qi.flags & PASSTHRU_SET_INFO) {
1569 oparms.desired_access = GENERIC_WRITE;
1570 } else {
1571 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1572 }
1573
1574 rc = SMB2_open_init(tcon, server,
1575 &rqst[0], &oplock, &oparms, path);
1576 if (rc)
1577 goto free_output_buffer;
1578 smb2_set_next_command(tcon, &rqst[0]);
1579
1580 /* Query */
1581 if (qi.flags & PASSTHRU_FSCTL) {
1582 /* Can eventually relax perm check since server enforces too */
1583 if (!capable(CAP_SYS_ADMIN)) {
1584 rc = -EPERM;
1585 goto free_open_req;
1586 }
1587 rqst[1].rq_iov = &vars->io_iov[0];
1588 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1589
1590 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1591 qi.info_type, buffer, qi.output_buffer_length,
1592 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1593 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1594 free_req1_func = SMB2_ioctl_free;
1595 } else if (qi.flags == PASSTHRU_SET_INFO) {
1596 /* Can eventually relax perm check since server enforces too */
1597 if (!capable(CAP_SYS_ADMIN)) {
1598 rc = -EPERM;
1599 goto free_open_req;
1600 }
1601 if (qi.output_buffer_length < 8) {
1602 rc = -EINVAL;
1603 goto free_open_req;
1604 }
1605 rqst[1].rq_iov = vars->si_iov;
1606 rqst[1].rq_nvec = 1;
1607
1608 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1609 size[0] = 8;
1610 data[0] = buffer;
1611
1612 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1613 current->tgid, FILE_END_OF_FILE_INFORMATION,
1614 SMB2_O_INFO_FILE, 0, data, size);
1615 free_req1_func = SMB2_set_info_free;
1616 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1617 rqst[1].rq_iov = &vars->qi_iov;
1618 rqst[1].rq_nvec = 1;
1619
1620 rc = SMB2_query_info_init(tcon, server,
1621 &rqst[1], COMPOUND_FID,
1622 COMPOUND_FID, qi.file_info_class,
1623 qi.info_type, qi.additional_information,
1624 qi.input_buffer_length,
1625 qi.output_buffer_length, buffer);
1626 free_req1_func = SMB2_query_info_free;
1627 } else { /* unknown flags */
1628 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1629 qi.flags);
1630 rc = -EINVAL;
1631 }
1632
1633 if (rc)
1634 goto free_open_req;
1635 smb2_set_next_command(tcon, &rqst[1]);
1636 smb2_set_related(&rqst[1]);
1637
1638 /* Close */
1639 rqst[2].rq_iov = &vars->close_iov;
1640 rqst[2].rq_nvec = 1;
1641
1642 rc = SMB2_close_init(tcon, server,
1643 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1644 if (rc)
1645 goto free_req_1;
1646 smb2_set_related(&rqst[2]);
1647
1648 rc = compound_send_recv(xid, ses, server,
1649 flags, 3, rqst,
1650 resp_buftype, rsp_iov);
1651 if (rc)
1652 goto out;
1653
1654 /* No need to bump num_remote_opens since handle immediately closed */
1655 if (qi.flags & PASSTHRU_FSCTL) {
1656 pqi = (struct smb_query_info __user *)arg;
1657 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1658 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1659 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1660 if (qi.input_buffer_length > 0 &&
1661 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1662 > rsp_iov[1].iov_len) {
1663 rc = -EFAULT;
1664 goto out;
1665 }
1666
1667 if (copy_to_user(&pqi->input_buffer_length,
1668 &qi.input_buffer_length,
1669 sizeof(qi.input_buffer_length))) {
1670 rc = -EFAULT;
1671 goto out;
1672 }
1673
1674 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1675 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1676 qi.input_buffer_length))
1677 rc = -EFAULT;
1678 } else {
1679 pqi = (struct smb_query_info __user *)arg;
1680 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1681 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1682 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1683 if (copy_to_user(&pqi->input_buffer_length,
1684 &qi.input_buffer_length,
1685 sizeof(qi.input_buffer_length))) {
1686 rc = -EFAULT;
1687 goto out;
1688 }
1689
1690 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1691 qi.input_buffer_length))
1692 rc = -EFAULT;
1693 }
1694
1695 out:
1696 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1697 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1698 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1699 SMB2_close_free(&rqst[2]);
1700 free_req_1:
1701 free_req1_func(&rqst[1]);
1702 free_open_req:
1703 SMB2_open_free(&rqst[0]);
1704 free_output_buffer:
1705 kfree(buffer);
1706 free_vars:
1707 kfree(vars);
1708 return rc;
1709 }
1710
1711 static ssize_t
1712 smb2_copychunk_range(const unsigned int xid,
1713 struct cifsFileInfo *srcfile,
1714 struct cifsFileInfo *trgtfile, u64 src_off,
1715 u64 len, u64 dest_off)
1716 {
1717 int rc;
1718 unsigned int ret_data_len;
1719 struct copychunk_ioctl *pcchunk;
1720 struct copychunk_ioctl_rsp *retbuf = NULL;
1721 struct cifs_tcon *tcon;
1722 int chunks_copied = 0;
1723 bool chunk_sizes_updated = false;
1724 ssize_t bytes_written, total_bytes_written = 0;
1725
1726 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1727 if (pcchunk == NULL)
1728 return -ENOMEM;
1729
1730 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1731 /* Request a key from the server to identify the source of the copy */
1732 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1733 srcfile->fid.persistent_fid,
1734 srcfile->fid.volatile_fid, pcchunk);
1735
1736 /* Note: request_res_key sets res_key null only if rc !=0 */
1737 if (rc)
1738 goto cchunk_out;
1739
1740 /* For now array only one chunk long, will make more flexible later */
1741 pcchunk->ChunkCount = cpu_to_le32(1);
1742 pcchunk->Reserved = 0;
1743 pcchunk->Reserved2 = 0;
1744
1745 tcon = tlink_tcon(trgtfile->tlink);
1746
1747 while (len > 0) {
1748 pcchunk->SourceOffset = cpu_to_le64(src_off);
1749 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1750 pcchunk->Length =
1751 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1752
1753 /* Request server copy to target from src identified by key */
1754 kfree(retbuf);
1755 retbuf = NULL;
1756 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1757 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1758 (char *)pcchunk, sizeof(struct copychunk_ioctl),
1759 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1760 if (rc == 0) {
1761 if (ret_data_len !=
1762 sizeof(struct copychunk_ioctl_rsp)) {
1763 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1764 rc = -EIO;
1765 goto cchunk_out;
1766 }
1767 if (retbuf->TotalBytesWritten == 0) {
1768 cifs_dbg(FYI, "no bytes copied\n");
1769 rc = -EIO;
1770 goto cchunk_out;
1771 }
1772 /*
1773 * Check if server claimed to write more than we asked
1774 */
1775 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1776 le32_to_cpu(pcchunk->Length)) {
1777 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1778 rc = -EIO;
1779 goto cchunk_out;
1780 }
1781 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1782 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1783 rc = -EIO;
1784 goto cchunk_out;
1785 }
1786 chunks_copied++;
1787
1788 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1789 src_off += bytes_written;
1790 dest_off += bytes_written;
1791 len -= bytes_written;
1792 total_bytes_written += bytes_written;
1793
1794 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1795 le32_to_cpu(retbuf->ChunksWritten),
1796 le32_to_cpu(retbuf->ChunkBytesWritten),
1797 bytes_written);
1798 } else if (rc == -EINVAL) {
1799 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1800 goto cchunk_out;
1801
1802 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1803 le32_to_cpu(retbuf->ChunksWritten),
1804 le32_to_cpu(retbuf->ChunkBytesWritten),
1805 le32_to_cpu(retbuf->TotalBytesWritten));
1806
1807 /*
1808 * Check if this is the first request using these sizes,
1809 * (ie check if copy succeed once with original sizes
1810 * and check if the server gave us different sizes after
1811 * we already updated max sizes on previous request).
1812 * if not then why is the server returning an error now
1813 */
1814 if ((chunks_copied != 0) || chunk_sizes_updated)
1815 goto cchunk_out;
1816
1817 /* Check that server is not asking us to grow size */
1818 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1819 tcon->max_bytes_chunk)
1820 tcon->max_bytes_chunk =
1821 le32_to_cpu(retbuf->ChunkBytesWritten);
1822 else
1823 goto cchunk_out; /* server gave us bogus size */
1824
1825 /* No need to change MaxChunks since already set to 1 */
1826 chunk_sizes_updated = true;
1827 } else
1828 goto cchunk_out;
1829 }
1830
1831 cchunk_out:
1832 kfree(pcchunk);
1833 kfree(retbuf);
1834 if (rc)
1835 return rc;
1836 else
1837 return total_bytes_written;
1838 }
1839
1840 static int
1841 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1842 struct cifs_fid *fid)
1843 {
1844 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1845 }
1846
1847 static unsigned int
1848 smb2_read_data_offset(char *buf)
1849 {
1850 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1851
1852 return rsp->DataOffset;
1853 }
1854
1855 static unsigned int
1856 smb2_read_data_length(char *buf, bool in_remaining)
1857 {
1858 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1859
1860 if (in_remaining)
1861 return le32_to_cpu(rsp->DataRemaining);
1862
1863 return le32_to_cpu(rsp->DataLength);
1864 }
1865
1866
1867 static int
1868 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1869 struct cifs_io_parms *parms, unsigned int *bytes_read,
1870 char **buf, int *buf_type)
1871 {
1872 parms->persistent_fid = pfid->persistent_fid;
1873 parms->volatile_fid = pfid->volatile_fid;
1874 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1875 }
1876
1877 static int
1878 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1879 struct cifs_io_parms *parms, unsigned int *written,
1880 struct kvec *iov, unsigned long nr_segs)
1881 {
1882
1883 parms->persistent_fid = pfid->persistent_fid;
1884 parms->volatile_fid = pfid->volatile_fid;
1885 return SMB2_write(xid, parms, written, iov, nr_segs);
1886 }
1887
1888 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1889 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1890 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1891 {
1892 struct cifsInodeInfo *cifsi;
1893 int rc;
1894
1895 cifsi = CIFS_I(inode);
1896
1897 /* if file already sparse don't bother setting sparse again */
1898 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1899 return true; /* already sparse */
1900
1901 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1902 return true; /* already not sparse */
1903
1904 /*
1905 * Can't check for sparse support on share the usual way via the
1906 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1907 * since Samba server doesn't set the flag on the share, yet
1908 * supports the set sparse FSCTL and returns sparse correctly
1909 * in the file attributes. If we fail setting sparse though we
1910 * mark that server does not support sparse files for this share
1911 * to avoid repeatedly sending the unsupported fsctl to server
1912 * if the file is repeatedly extended.
1913 */
1914 if (tcon->broken_sparse_sup)
1915 return false;
1916
1917 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1918 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1919 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1920 if (rc) {
1921 tcon->broken_sparse_sup = true;
1922 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1923 return false;
1924 }
1925
1926 if (setsparse)
1927 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1928 else
1929 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1930
1931 return true;
1932 }
1933
1934 static int
1935 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1936 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1937 {
1938 __le64 eof = cpu_to_le64(size);
1939 struct inode *inode;
1940
1941 /*
1942 * If extending file more than one page make sparse. Many Linux fs
1943 * make files sparse by default when extending via ftruncate
1944 */
1945 inode = d_inode(cfile->dentry);
1946
1947 if (!set_alloc && (size > inode->i_size + 8192)) {
1948 __u8 set_sparse = 1;
1949
1950 /* whether set sparse succeeds or not, extend the file */
1951 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1952 }
1953
1954 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1955 cfile->fid.volatile_fid, cfile->pid, &eof);
1956 }
1957
1958 static int
1959 smb2_duplicate_extents(const unsigned int xid,
1960 struct cifsFileInfo *srcfile,
1961 struct cifsFileInfo *trgtfile, u64 src_off,
1962 u64 len, u64 dest_off)
1963 {
1964 int rc;
1965 unsigned int ret_data_len;
1966 struct inode *inode;
1967 struct duplicate_extents_to_file dup_ext_buf;
1968 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1969
1970 /* server fileays advertise duplicate extent support with this flag */
1971 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1972 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1973 return -EOPNOTSUPP;
1974
1975 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1976 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1977 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1978 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1979 dup_ext_buf.ByteCount = cpu_to_le64(len);
1980 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1981 src_off, dest_off, len);
1982
1983 inode = d_inode(trgtfile->dentry);
1984 if (inode->i_size < dest_off + len) {
1985 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1986 if (rc)
1987 goto duplicate_extents_out;
1988
1989 /*
1990 * Although also could set plausible allocation size (i_blocks)
1991 * here in addition to setting the file size, in reflink
1992 * it is likely that the target file is sparse. Its allocation
1993 * size will be queried on next revalidate, but it is important
1994 * to make sure that file's cached size is updated immediately
1995 */
1996 cifs_setsize(inode, dest_off + len);
1997 }
1998 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1999 trgtfile->fid.volatile_fid,
2000 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2001 (char *)&dup_ext_buf,
2002 sizeof(struct duplicate_extents_to_file),
2003 CIFSMaxBufSize, NULL,
2004 &ret_data_len);
2005
2006 if (ret_data_len > 0)
2007 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2008
2009 duplicate_extents_out:
2010 return rc;
2011 }
2012
2013 static int
2014 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2015 struct cifsFileInfo *cfile)
2016 {
2017 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2018 cfile->fid.volatile_fid);
2019 }
2020
2021 static int
2022 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2023 struct cifsFileInfo *cfile)
2024 {
2025 struct fsctl_set_integrity_information_req integr_info;
2026 unsigned int ret_data_len;
2027
2028 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2029 integr_info.Flags = 0;
2030 integr_info.Reserved = 0;
2031
2032 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2033 cfile->fid.volatile_fid,
2034 FSCTL_SET_INTEGRITY_INFORMATION,
2035 (char *)&integr_info,
2036 sizeof(struct fsctl_set_integrity_information_req),
2037 CIFSMaxBufSize, NULL,
2038 &ret_data_len);
2039
2040 }
2041
2042 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2043 #define GMT_TOKEN_SIZE 50
2044
2045 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2046
2047 /*
2048 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2049 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2050 */
2051 static int
2052 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2053 struct cifsFileInfo *cfile, void __user *ioc_buf)
2054 {
2055 char *retbuf = NULL;
2056 unsigned int ret_data_len = 0;
2057 int rc;
2058 u32 max_response_size;
2059 struct smb_snapshot_array snapshot_in;
2060
2061 /*
2062 * On the first query to enumerate the list of snapshots available
2063 * for this volume the buffer begins with 0 (number of snapshots
2064 * which can be returned is zero since at that point we do not know
2065 * how big the buffer needs to be). On the second query,
2066 * it (ret_data_len) is set to number of snapshots so we can
2067 * know to set the maximum response size larger (see below).
2068 */
2069 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2070 return -EFAULT;
2071
2072 /*
2073 * Note that for snapshot queries that servers like Azure expect that
2074 * the first query be minimal size (and just used to get the number/size
2075 * of previous versions) so response size must be specified as EXACTLY
2076 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2077 * of eight bytes.
2078 */
2079 if (ret_data_len == 0)
2080 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2081 else
2082 max_response_size = CIFSMaxBufSize;
2083
2084 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2085 cfile->fid.volatile_fid,
2086 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2087 NULL, 0 /* no input data */, max_response_size,
2088 (char **)&retbuf,
2089 &ret_data_len);
2090 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2091 rc, ret_data_len);
2092 if (rc)
2093 return rc;
2094
2095 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2096 /* Fixup buffer */
2097 if (copy_from_user(&snapshot_in, ioc_buf,
2098 sizeof(struct smb_snapshot_array))) {
2099 rc = -EFAULT;
2100 kfree(retbuf);
2101 return rc;
2102 }
2103
2104 /*
2105 * Check for min size, ie not large enough to fit even one GMT
2106 * token (snapshot). On the first ioctl some users may pass in
2107 * smaller size (or zero) to simply get the size of the array
2108 * so the user space caller can allocate sufficient memory
2109 * and retry the ioctl again with larger array size sufficient
2110 * to hold all of the snapshot GMT tokens on the second try.
2111 */
2112 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2113 ret_data_len = sizeof(struct smb_snapshot_array);
2114
2115 /*
2116 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2117 * the snapshot array (of 50 byte GMT tokens) each
2118 * representing an available previous version of the data
2119 */
2120 if (ret_data_len > (snapshot_in.snapshot_array_size +
2121 sizeof(struct smb_snapshot_array)))
2122 ret_data_len = snapshot_in.snapshot_array_size +
2123 sizeof(struct smb_snapshot_array);
2124
2125 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2126 rc = -EFAULT;
2127 }
2128
2129 kfree(retbuf);
2130 return rc;
2131 }
2132
2133
2134
2135 static int
2136 smb3_notify(const unsigned int xid, struct file *pfile,
2137 void __user *ioc_buf, bool return_changes)
2138 {
2139 struct smb3_notify_info notify;
2140 struct smb3_notify_info __user *pnotify_buf;
2141 struct dentry *dentry = pfile->f_path.dentry;
2142 struct inode *inode = file_inode(pfile);
2143 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2144 struct cifs_open_parms oparms;
2145 struct cifs_fid fid;
2146 struct cifs_tcon *tcon;
2147 const unsigned char *path;
2148 char *returned_ioctl_info = NULL;
2149 void *page = alloc_dentry_path();
2150 __le16 *utf16_path = NULL;
2151 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2152 int rc = 0;
2153 __u32 ret_len = 0;
2154
2155 path = build_path_from_dentry(dentry, page);
2156 if (IS_ERR(path)) {
2157 rc = PTR_ERR(path);
2158 goto notify_exit;
2159 }
2160
2161 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2162 if (utf16_path == NULL) {
2163 rc = -ENOMEM;
2164 goto notify_exit;
2165 }
2166
2167 if (return_changes) {
2168 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2169 rc = -EFAULT;
2170 goto notify_exit;
2171 }
2172 } else {
2173 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2174 rc = -EFAULT;
2175 goto notify_exit;
2176 }
2177 notify.data_len = 0;
2178 }
2179
2180 tcon = cifs_sb_master_tcon(cifs_sb);
2181 oparms = (struct cifs_open_parms) {
2182 .tcon = tcon,
2183 .path = path,
2184 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2185 .disposition = FILE_OPEN,
2186 .create_options = cifs_create_options(cifs_sb, 0),
2187 .fid = &fid,
2188 };
2189
2190 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2191 NULL);
2192 if (rc)
2193 goto notify_exit;
2194
2195 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2196 notify.watch_tree, notify.completion_filter,
2197 notify.data_len, &returned_ioctl_info, &ret_len);
2198
2199 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2200
2201 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2202 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2203 if (ret_len > notify.data_len)
2204 ret_len = notify.data_len;
2205 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2206 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2207 rc = -EFAULT;
2208 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2209 rc = -EFAULT;
2210 }
2211 kfree(returned_ioctl_info);
2212 notify_exit:
2213 free_dentry_path(page);
2214 kfree(utf16_path);
2215 return rc;
2216 }
2217
2218 static int
2219 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2220 const char *path, struct cifs_sb_info *cifs_sb,
2221 struct cifs_fid *fid, __u16 search_flags,
2222 struct cifs_search_info *srch_inf)
2223 {
2224 __le16 *utf16_path;
2225 struct smb_rqst rqst[2];
2226 struct kvec rsp_iov[2];
2227 int resp_buftype[2];
2228 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2229 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2230 int rc, flags = 0;
2231 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2232 struct cifs_open_parms oparms;
2233 struct smb2_query_directory_rsp *qd_rsp = NULL;
2234 struct smb2_create_rsp *op_rsp = NULL;
2235 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2236 int retry_count = 0;
2237
2238 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2239 if (!utf16_path)
2240 return -ENOMEM;
2241
2242 if (smb3_encryption_required(tcon))
2243 flags |= CIFS_TRANSFORM_REQ;
2244
2245 memset(rqst, 0, sizeof(rqst));
2246 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2247 memset(rsp_iov, 0, sizeof(rsp_iov));
2248
2249 /* Open */
2250 memset(&open_iov, 0, sizeof(open_iov));
2251 rqst[0].rq_iov = open_iov;
2252 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2253
2254 oparms = (struct cifs_open_parms) {
2255 .tcon = tcon,
2256 .path = path,
2257 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2258 .disposition = FILE_OPEN,
2259 .create_options = cifs_create_options(cifs_sb, 0),
2260 .fid = fid,
2261 };
2262
2263 rc = SMB2_open_init(tcon, server,
2264 &rqst[0], &oplock, &oparms, utf16_path);
2265 if (rc)
2266 goto qdf_free;
2267 smb2_set_next_command(tcon, &rqst[0]);
2268
2269 /* Query directory */
2270 srch_inf->entries_in_buffer = 0;
2271 srch_inf->index_of_last_entry = 2;
2272
2273 memset(&qd_iov, 0, sizeof(qd_iov));
2274 rqst[1].rq_iov = qd_iov;
2275 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2276
2277 rc = SMB2_query_directory_init(xid, tcon, server,
2278 &rqst[1],
2279 COMPOUND_FID, COMPOUND_FID,
2280 0, srch_inf->info_level);
2281 if (rc)
2282 goto qdf_free;
2283
2284 smb2_set_related(&rqst[1]);
2285
2286 again:
2287 rc = compound_send_recv(xid, tcon->ses, server,
2288 flags, 2, rqst,
2289 resp_buftype, rsp_iov);
2290
2291 if (rc == -EAGAIN && retry_count++ < 10)
2292 goto again;
2293
2294 /* If the open failed there is nothing to do */
2295 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2296 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2297 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2298 goto qdf_free;
2299 }
2300 fid->persistent_fid = op_rsp->PersistentFileId;
2301 fid->volatile_fid = op_rsp->VolatileFileId;
2302
2303 /* Anything else than ENODATA means a genuine error */
2304 if (rc && rc != -ENODATA) {
2305 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2306 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2307 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2308 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2309 goto qdf_free;
2310 }
2311
2312 atomic_inc(&tcon->num_remote_opens);
2313
2314 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2315 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2316 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2317 tcon->tid, tcon->ses->Suid, 0, 0);
2318 srch_inf->endOfSearch = true;
2319 rc = 0;
2320 goto qdf_free;
2321 }
2322
2323 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2324 srch_inf);
2325 if (rc) {
2326 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2327 tcon->ses->Suid, 0, 0, rc);
2328 goto qdf_free;
2329 }
2330 resp_buftype[1] = CIFS_NO_BUFFER;
2331
2332 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2333 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2334
2335 qdf_free:
2336 kfree(utf16_path);
2337 SMB2_open_free(&rqst[0]);
2338 SMB2_query_directory_free(&rqst[1]);
2339 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2340 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2341 return rc;
2342 }
2343
2344 static int
2345 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2346 struct cifs_fid *fid, __u16 search_flags,
2347 struct cifs_search_info *srch_inf)
2348 {
2349 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2350 fid->volatile_fid, 0, srch_inf);
2351 }
2352
2353 static int
2354 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2355 struct cifs_fid *fid)
2356 {
2357 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2358 }
2359
2360 /*
2361 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2362 * the number of credits and return true. Otherwise - return false.
2363 */
2364 static bool
2365 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2366 {
2367 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2368 int scredits, in_flight;
2369
2370 if (shdr->Status != STATUS_PENDING)
2371 return false;
2372
2373 if (shdr->CreditRequest) {
2374 spin_lock(&server->req_lock);
2375 server->credits += le16_to_cpu(shdr->CreditRequest);
2376 scredits = server->credits;
2377 in_flight = server->in_flight;
2378 spin_unlock(&server->req_lock);
2379 wake_up(&server->request_q);
2380
2381 trace_smb3_pend_credits(server->CurrentMid,
2382 server->conn_id, server->hostname, scredits,
2383 le16_to_cpu(shdr->CreditRequest), in_flight);
2384 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2385 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2386 }
2387
2388 return true;
2389 }
2390
2391 static bool
2392 smb2_is_session_expired(char *buf)
2393 {
2394 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2395
2396 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2397 shdr->Status != STATUS_USER_SESSION_DELETED)
2398 return false;
2399
2400 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2401 le64_to_cpu(shdr->SessionId),
2402 le16_to_cpu(shdr->Command),
2403 le64_to_cpu(shdr->MessageId));
2404 cifs_dbg(FYI, "Session expired or deleted\n");
2405
2406 return true;
2407 }
2408
2409 static bool
2410 smb2_is_status_io_timeout(char *buf)
2411 {
2412 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2413
2414 if (shdr->Status == STATUS_IO_TIMEOUT)
2415 return true;
2416 else
2417 return false;
2418 }
2419
2420 static bool
2421 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2422 {
2423 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2424 struct TCP_Server_Info *pserver;
2425 struct cifs_ses *ses;
2426 struct cifs_tcon *tcon;
2427
2428 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2429 return false;
2430
2431 /* If server is a channel, select the primary channel */
2432 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2433
2434 spin_lock(&cifs_tcp_ses_lock);
2435 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2436 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2437 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2438 spin_lock(&tcon->tc_lock);
2439 tcon->need_reconnect = true;
2440 spin_unlock(&tcon->tc_lock);
2441 spin_unlock(&cifs_tcp_ses_lock);
2442 pr_warn_once("Server share %s deleted.\n",
2443 tcon->tree_name);
2444 return true;
2445 }
2446 }
2447 }
2448 spin_unlock(&cifs_tcp_ses_lock);
2449
2450 return false;
2451 }
2452
2453 static int
2454 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2455 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2456 {
2457 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2458 return SMB2_lease_break(0, tcon, cinode->lease_key,
2459 smb2_get_lease_state(cinode));
2460
2461 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2462 CIFS_CACHE_READ(cinode) ? 1 : 0);
2463 }
2464
2465 void
2466 smb2_set_related(struct smb_rqst *rqst)
2467 {
2468 struct smb2_hdr *shdr;
2469
2470 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2471 if (shdr == NULL) {
2472 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2473 return;
2474 }
2475 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2476 }
2477
2478 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2479
2480 void
2481 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2482 {
2483 struct smb2_hdr *shdr;
2484 struct cifs_ses *ses = tcon->ses;
2485 struct TCP_Server_Info *server = ses->server;
2486 unsigned long len = smb_rqst_len(server, rqst);
2487 int i, num_padding;
2488
2489 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2490 if (shdr == NULL) {
2491 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2492 return;
2493 }
2494
2495 /* SMB headers in a compound are 8 byte aligned. */
2496
2497 /* No padding needed */
2498 if (!(len & 7))
2499 goto finished;
2500
2501 num_padding = 8 - (len & 7);
2502 if (!smb3_encryption_required(tcon)) {
2503 /*
2504 * If we do not have encryption then we can just add an extra
2505 * iov for the padding.
2506 */
2507 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2508 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2509 rqst->rq_nvec++;
2510 len += num_padding;
2511 } else {
2512 /*
2513 * We can not add a small padding iov for the encryption case
2514 * because the encryption framework can not handle the padding
2515 * iovs.
2516 * We have to flatten this into a single buffer and add
2517 * the padding to it.
2518 */
2519 for (i = 1; i < rqst->rq_nvec; i++) {
2520 memcpy(rqst->rq_iov[0].iov_base +
2521 rqst->rq_iov[0].iov_len,
2522 rqst->rq_iov[i].iov_base,
2523 rqst->rq_iov[i].iov_len);
2524 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2525 }
2526 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2527 0, num_padding);
2528 rqst->rq_iov[0].iov_len += num_padding;
2529 len += num_padding;
2530 rqst->rq_nvec = 1;
2531 }
2532
2533 finished:
2534 shdr->NextCommand = cpu_to_le32(len);
2535 }
2536
2537 /*
2538 * Passes the query info response back to the caller on success.
2539 * Caller need to free this with free_rsp_buf().
2540 */
2541 int
2542 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2543 const char *path, u32 desired_access,
2544 u32 class, u32 type, u32 output_len,
2545 struct kvec *rsp, int *buftype,
2546 struct cifs_sb_info *cifs_sb)
2547 {
2548 struct smb2_compound_vars *vars;
2549 struct cifs_ses *ses = tcon->ses;
2550 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2551 int flags = CIFS_CP_CREATE_CLOSE_OP;
2552 struct smb_rqst *rqst;
2553 int resp_buftype[3];
2554 struct kvec *rsp_iov;
2555 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2556 struct cifs_open_parms oparms;
2557 struct cifs_fid fid;
2558 int rc;
2559 __le16 *utf16_path;
2560 struct cached_fid *cfid = NULL;
2561
2562 if (!path)
2563 path = "";
2564 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2565 if (!utf16_path)
2566 return -ENOMEM;
2567
2568 if (smb3_encryption_required(tcon))
2569 flags |= CIFS_TRANSFORM_REQ;
2570
2571 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2572 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2573 if (!vars) {
2574 rc = -ENOMEM;
2575 goto out_free_path;
2576 }
2577 rqst = vars->rqst;
2578 rsp_iov = vars->rsp_iov;
2579
2580 /*
2581 * We can only call this for things we know are directories.
2582 */
2583 if (!strcmp(path, ""))
2584 open_cached_dir(xid, tcon, path, cifs_sb, false,
2585 &cfid); /* cfid null if open dir failed */
2586
2587 rqst[0].rq_iov = vars->open_iov;
2588 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2589
2590 oparms = (struct cifs_open_parms) {
2591 .tcon = tcon,
2592 .path = path,
2593 .desired_access = desired_access,
2594 .disposition = FILE_OPEN,
2595 .create_options = cifs_create_options(cifs_sb, 0),
2596 .fid = &fid,
2597 };
2598
2599 rc = SMB2_open_init(tcon, server,
2600 &rqst[0], &oplock, &oparms, utf16_path);
2601 if (rc)
2602 goto qic_exit;
2603 smb2_set_next_command(tcon, &rqst[0]);
2604
2605 rqst[1].rq_iov = &vars->qi_iov;
2606 rqst[1].rq_nvec = 1;
2607
2608 if (cfid) {
2609 rc = SMB2_query_info_init(tcon, server,
2610 &rqst[1],
2611 cfid->fid.persistent_fid,
2612 cfid->fid.volatile_fid,
2613 class, type, 0,
2614 output_len, 0,
2615 NULL);
2616 } else {
2617 rc = SMB2_query_info_init(tcon, server,
2618 &rqst[1],
2619 COMPOUND_FID,
2620 COMPOUND_FID,
2621 class, type, 0,
2622 output_len, 0,
2623 NULL);
2624 }
2625 if (rc)
2626 goto qic_exit;
2627 if (!cfid) {
2628 smb2_set_next_command(tcon, &rqst[1]);
2629 smb2_set_related(&rqst[1]);
2630 }
2631
2632 rqst[2].rq_iov = &vars->close_iov;
2633 rqst[2].rq_nvec = 1;
2634
2635 rc = SMB2_close_init(tcon, server,
2636 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2637 if (rc)
2638 goto qic_exit;
2639 smb2_set_related(&rqst[2]);
2640
2641 if (cfid) {
2642 rc = compound_send_recv(xid, ses, server,
2643 flags, 1, &rqst[1],
2644 &resp_buftype[1], &rsp_iov[1]);
2645 } else {
2646 rc = compound_send_recv(xid, ses, server,
2647 flags, 3, rqst,
2648 resp_buftype, rsp_iov);
2649 }
2650 if (rc) {
2651 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2652 if (rc == -EREMCHG) {
2653 tcon->need_reconnect = true;
2654 pr_warn_once("server share %s deleted\n",
2655 tcon->tree_name);
2656 }
2657 goto qic_exit;
2658 }
2659 *rsp = rsp_iov[1];
2660 *buftype = resp_buftype[1];
2661
2662 qic_exit:
2663 SMB2_open_free(&rqst[0]);
2664 SMB2_query_info_free(&rqst[1]);
2665 SMB2_close_free(&rqst[2]);
2666 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2667 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2668 if (cfid)
2669 close_cached_dir(cfid);
2670 kfree(vars);
2671 out_free_path:
2672 kfree(utf16_path);
2673 return rc;
2674 }
2675
2676 static int
2677 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2678 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2679 {
2680 struct smb2_query_info_rsp *rsp;
2681 struct smb2_fs_full_size_info *info = NULL;
2682 struct kvec rsp_iov = {NULL, 0};
2683 int buftype = CIFS_NO_BUFFER;
2684 int rc;
2685
2686
2687 rc = smb2_query_info_compound(xid, tcon, "",
2688 FILE_READ_ATTRIBUTES,
2689 FS_FULL_SIZE_INFORMATION,
2690 SMB2_O_INFO_FILESYSTEM,
2691 sizeof(struct smb2_fs_full_size_info),
2692 &rsp_iov, &buftype, cifs_sb);
2693 if (rc)
2694 goto qfs_exit;
2695
2696 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2697 buf->f_type = SMB2_SUPER_MAGIC;
2698 info = (struct smb2_fs_full_size_info *)(
2699 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2700 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2701 le32_to_cpu(rsp->OutputBufferLength),
2702 &rsp_iov,
2703 sizeof(struct smb2_fs_full_size_info));
2704 if (!rc)
2705 smb2_copy_fs_info_to_kstatfs(info, buf);
2706
2707 qfs_exit:
2708 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2709 free_rsp_buf(buftype, rsp_iov.iov_base);
2710 return rc;
2711 }
2712
2713 static int
2714 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2715 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2716 {
2717 int rc;
2718 __le16 srch_path = 0; /* Null - open root of share */
2719 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2720 struct cifs_open_parms oparms;
2721 struct cifs_fid fid;
2722
2723 if (!tcon->posix_extensions)
2724 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2725
2726 oparms = (struct cifs_open_parms) {
2727 .tcon = tcon,
2728 .path = "",
2729 .desired_access = FILE_READ_ATTRIBUTES,
2730 .disposition = FILE_OPEN,
2731 .create_options = cifs_create_options(cifs_sb, 0),
2732 .fid = &fid,
2733 };
2734
2735 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2736 NULL, NULL);
2737 if (rc)
2738 return rc;
2739
2740 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2741 fid.volatile_fid, buf);
2742 buf->f_type = SMB2_SUPER_MAGIC;
2743 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2744 return rc;
2745 }
2746
2747 static bool
2748 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2749 {
2750 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2751 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2752 }
2753
2754 static int
2755 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2756 __u64 length, __u32 type, int lock, int unlock, bool wait)
2757 {
2758 if (unlock && !lock)
2759 type = SMB2_LOCKFLAG_UNLOCK;
2760 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2761 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2762 current->tgid, length, offset, type, wait);
2763 }
2764
2765 static void
2766 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2767 {
2768 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2769 }
2770
2771 static void
2772 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2773 {
2774 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2775 }
2776
2777 static void
2778 smb2_new_lease_key(struct cifs_fid *fid)
2779 {
2780 generate_random_uuid(fid->lease_key);
2781 }
2782
2783 static int
2784 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2785 const char *search_name,
2786 struct dfs_info3_param **target_nodes,
2787 unsigned int *num_of_nodes,
2788 const struct nls_table *nls_codepage, int remap)
2789 {
2790 int rc;
2791 __le16 *utf16_path = NULL;
2792 int utf16_path_len = 0;
2793 struct cifs_tcon *tcon;
2794 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2795 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2796 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2797 int retry_count = 0;
2798
2799 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2800
2801 /*
2802 * Try to use the IPC tcon, otherwise just use any
2803 */
2804 tcon = ses->tcon_ipc;
2805 if (tcon == NULL) {
2806 spin_lock(&cifs_tcp_ses_lock);
2807 tcon = list_first_entry_or_null(&ses->tcon_list,
2808 struct cifs_tcon,
2809 tcon_list);
2810 if (tcon)
2811 tcon->tc_count++;
2812 spin_unlock(&cifs_tcp_ses_lock);
2813 }
2814
2815 if (tcon == NULL) {
2816 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2817 ses);
2818 rc = -ENOTCONN;
2819 goto out;
2820 }
2821
2822 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2823 &utf16_path_len,
2824 nls_codepage, remap);
2825 if (!utf16_path) {
2826 rc = -ENOMEM;
2827 goto out;
2828 }
2829
2830 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2831 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2832 if (!dfs_req) {
2833 rc = -ENOMEM;
2834 goto out;
2835 }
2836
2837 /* Highest DFS referral version understood */
2838 dfs_req->MaxReferralLevel = DFS_VERSION;
2839
2840 /* Path to resolve in an UTF-16 null-terminated string */
2841 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2842
2843 do {
2844 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2845 FSCTL_DFS_GET_REFERRALS,
2846 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2847 (char **)&dfs_rsp, &dfs_rsp_size);
2848 if (!is_retryable_error(rc))
2849 break;
2850 usleep_range(512, 2048);
2851 } while (++retry_count < 5);
2852
2853 if (!rc && !dfs_rsp)
2854 rc = -EIO;
2855 if (rc) {
2856 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2857 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2858 goto out;
2859 }
2860
2861 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2862 num_of_nodes, target_nodes,
2863 nls_codepage, remap, search_name,
2864 true /* is_unicode */);
2865 if (rc) {
2866 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2867 goto out;
2868 }
2869
2870 out:
2871 if (tcon && !tcon->ipc) {
2872 /* ipc tcons are not refcounted */
2873 spin_lock(&cifs_tcp_ses_lock);
2874 tcon->tc_count--;
2875 /* tc_count can never go negative */
2876 WARN_ON(tcon->tc_count < 0);
2877 spin_unlock(&cifs_tcp_ses_lock);
2878 }
2879 kfree(utf16_path);
2880 kfree(dfs_req);
2881 kfree(dfs_rsp);
2882 return rc;
2883 }
2884
2885 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2886 static int parse_reparse_posix(struct reparse_posix_data *buf,
2887 struct cifs_sb_info *cifs_sb,
2888 struct cifs_open_info_data *data)
2889 {
2890 unsigned int len;
2891 u64 type;
2892
2893 switch ((type = le64_to_cpu(buf->InodeType))) {
2894 case NFS_SPECFILE_LNK:
2895 len = le16_to_cpu(buf->ReparseDataLength);
2896 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2897 len, true,
2898 cifs_sb->local_nls);
2899 if (!data->symlink_target)
2900 return -ENOMEM;
2901 convert_delimiter(data->symlink_target, '/');
2902 cifs_dbg(FYI, "%s: target path: %s\n",
2903 __func__, data->symlink_target);
2904 break;
2905 case NFS_SPECFILE_CHR:
2906 case NFS_SPECFILE_BLK:
2907 case NFS_SPECFILE_FIFO:
2908 case NFS_SPECFILE_SOCK:
2909 break;
2910 default:
2911 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2912 __func__, type);
2913 return -EOPNOTSUPP;
2914 }
2915 return 0;
2916 }
2917
2918 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2919 u32 plen, bool unicode,
2920 struct cifs_sb_info *cifs_sb,
2921 struct cifs_open_info_data *data)
2922 {
2923 unsigned int len;
2924 unsigned int offs;
2925
2926 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2927
2928 offs = le16_to_cpu(sym->SubstituteNameOffset);
2929 len = le16_to_cpu(sym->SubstituteNameLength);
2930 if (offs + 20 > plen || offs + len + 20 > plen) {
2931 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2932 return -EIO;
2933 }
2934
2935 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2936 len, unicode,
2937 cifs_sb->local_nls);
2938 if (!data->symlink_target)
2939 return -ENOMEM;
2940
2941 convert_delimiter(data->symlink_target, '/');
2942 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2943
2944 return 0;
2945 }
2946
2947 int parse_reparse_point(struct reparse_data_buffer *buf,
2948 u32 plen, struct cifs_sb_info *cifs_sb,
2949 bool unicode, struct cifs_open_info_data *data)
2950 {
2951 if (plen < sizeof(*buf)) {
2952 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2953 __func__, plen);
2954 return -EIO;
2955 }
2956
2957 if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2958 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
2959 __func__, plen);
2960 return -EIO;
2961 }
2962
2963 data->reparse.buf = buf;
2964
2965 /* See MS-FSCC 2.1.2 */
2966 switch (le32_to_cpu(buf->ReparseTag)) {
2967 case IO_REPARSE_TAG_NFS:
2968 return parse_reparse_posix((struct reparse_posix_data *)buf,
2969 cifs_sb, data);
2970 case IO_REPARSE_TAG_SYMLINK:
2971 return parse_reparse_symlink(
2972 (struct reparse_symlink_data_buffer *)buf,
2973 plen, unicode, cifs_sb, data);
2974 case IO_REPARSE_TAG_LX_SYMLINK:
2975 case IO_REPARSE_TAG_AF_UNIX:
2976 case IO_REPARSE_TAG_LX_FIFO:
2977 case IO_REPARSE_TAG_LX_CHR:
2978 case IO_REPARSE_TAG_LX_BLK:
2979 return 0;
2980 default:
2981 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2982 __func__, le32_to_cpu(buf->ReparseTag));
2983 return -EOPNOTSUPP;
2984 }
2985 }
2986
2987 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2988 struct kvec *rsp_iov,
2989 struct cifs_open_info_data *data)
2990 {
2991 struct reparse_data_buffer *buf;
2992 struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2993 u32 plen = le32_to_cpu(io->OutputCount);
2994
2995 buf = (struct reparse_data_buffer *)((u8 *)io +
2996 le32_to_cpu(io->OutputOffset));
2997 return parse_reparse_point(buf, plen, cifs_sb, true, data);
2998 }
2999
3000 static struct cifs_ntsd *
3001 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3002 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3003 {
3004 struct cifs_ntsd *pntsd = NULL;
3005 unsigned int xid;
3006 int rc = -EOPNOTSUPP;
3007 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3008
3009 if (IS_ERR(tlink))
3010 return ERR_CAST(tlink);
3011
3012 xid = get_xid();
3013 cifs_dbg(FYI, "trying to get acl\n");
3014
3015 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3016 cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3017 info);
3018 free_xid(xid);
3019
3020 cifs_put_tlink(tlink);
3021
3022 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3023 if (rc)
3024 return ERR_PTR(rc);
3025 return pntsd;
3026
3027 }
3028
3029 static struct cifs_ntsd *
3030 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3031 const char *path, u32 *pacllen, u32 info)
3032 {
3033 struct cifs_ntsd *pntsd = NULL;
3034 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3035 unsigned int xid;
3036 int rc;
3037 struct cifs_tcon *tcon;
3038 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3039 struct cifs_fid fid;
3040 struct cifs_open_parms oparms;
3041 __le16 *utf16_path;
3042
3043 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3044 if (IS_ERR(tlink))
3045 return ERR_CAST(tlink);
3046
3047 tcon = tlink_tcon(tlink);
3048 xid = get_xid();
3049
3050 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3051 if (!utf16_path) {
3052 rc = -ENOMEM;
3053 free_xid(xid);
3054 return ERR_PTR(rc);
3055 }
3056
3057 oparms = (struct cifs_open_parms) {
3058 .tcon = tcon,
3059 .path = path,
3060 .desired_access = READ_CONTROL,
3061 .disposition = FILE_OPEN,
3062 /*
3063 * When querying an ACL, even if the file is a symlink
3064 * we want to open the source not the target, and so
3065 * the protocol requires that the client specify this
3066 * flag when opening a reparse point
3067 */
3068 .create_options = cifs_create_options(cifs_sb, 0) |
3069 OPEN_REPARSE_POINT,
3070 .fid = &fid,
3071 };
3072
3073 if (info & SACL_SECINFO)
3074 oparms.desired_access |= SYSTEM_SECURITY;
3075
3076 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3077 NULL);
3078 kfree(utf16_path);
3079 if (!rc) {
3080 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3081 fid.volatile_fid, (void **)&pntsd, pacllen,
3082 info);
3083 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3084 }
3085
3086 cifs_put_tlink(tlink);
3087 free_xid(xid);
3088
3089 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3090 if (rc)
3091 return ERR_PTR(rc);
3092 return pntsd;
3093 }
3094
3095 static int
3096 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3097 struct inode *inode, const char *path, int aclflag)
3098 {
3099 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3100 unsigned int xid;
3101 int rc, access_flags = 0;
3102 struct cifs_tcon *tcon;
3103 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3104 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3105 struct cifs_fid fid;
3106 struct cifs_open_parms oparms;
3107 __le16 *utf16_path;
3108
3109 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3110 if (IS_ERR(tlink))
3111 return PTR_ERR(tlink);
3112
3113 tcon = tlink_tcon(tlink);
3114 xid = get_xid();
3115
3116 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3117 access_flags |= WRITE_OWNER;
3118 if (aclflag & CIFS_ACL_SACL)
3119 access_flags |= SYSTEM_SECURITY;
3120 if (aclflag & CIFS_ACL_DACL)
3121 access_flags |= WRITE_DAC;
3122
3123 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3124 if (!utf16_path) {
3125 rc = -ENOMEM;
3126 free_xid(xid);
3127 return rc;
3128 }
3129
3130 oparms = (struct cifs_open_parms) {
3131 .tcon = tcon,
3132 .desired_access = access_flags,
3133 .create_options = cifs_create_options(cifs_sb, 0),
3134 .disposition = FILE_OPEN,
3135 .path = path,
3136 .fid = &fid,
3137 };
3138
3139 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3140 NULL, NULL);
3141 kfree(utf16_path);
3142 if (!rc) {
3143 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3144 fid.volatile_fid, pnntsd, acllen, aclflag);
3145 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3146 }
3147
3148 cifs_put_tlink(tlink);
3149 free_xid(xid);
3150 return rc;
3151 }
3152
3153 /* Retrieve an ACL from the server */
3154 static struct cifs_ntsd *
3155 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3156 struct inode *inode, const char *path,
3157 u32 *pacllen, u32 info)
3158 {
3159 struct cifs_ntsd *pntsd = NULL;
3160 struct cifsFileInfo *open_file = NULL;
3161
3162 if (inode && !(info & SACL_SECINFO))
3163 open_file = find_readable_file(CIFS_I(inode), true);
3164 if (!open_file || (info & SACL_SECINFO))
3165 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3166
3167 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3168 cifsFileInfo_put(open_file);
3169 return pntsd;
3170 }
3171
3172 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3173 loff_t offset, loff_t len, unsigned int xid)
3174 {
3175 struct cifsFileInfo *cfile = file->private_data;
3176 struct file_zero_data_information fsctl_buf;
3177
3178 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3179
3180 fsctl_buf.FileOffset = cpu_to_le64(offset);
3181 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3182
3183 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3184 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3185 (char *)&fsctl_buf,
3186 sizeof(struct file_zero_data_information),
3187 0, NULL, NULL);
3188 }
3189
3190 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3191 loff_t offset, loff_t len, bool keep_size)
3192 {
3193 struct cifs_ses *ses = tcon->ses;
3194 struct inode *inode = file_inode(file);
3195 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3196 struct cifsFileInfo *cfile = file->private_data;
3197 unsigned long long new_size;
3198 long rc;
3199 unsigned int xid;
3200 __le64 eof;
3201
3202 xid = get_xid();
3203
3204 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3205 ses->Suid, offset, len);
3206
3207 inode_lock(inode);
3208 filemap_invalidate_lock(inode->i_mapping);
3209
3210 /*
3211 * We zero the range through ioctl, so we need remove the page caches
3212 * first, otherwise the data may be inconsistent with the server.
3213 */
3214 truncate_pagecache_range(inode, offset, offset + len - 1);
3215
3216 /* if file not oplocked can't be sure whether asking to extend size */
3217 rc = -EOPNOTSUPP;
3218 if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3219 goto zero_range_exit;
3220
3221 rc = smb3_zero_data(file, tcon, offset, len, xid);
3222 if (rc < 0)
3223 goto zero_range_exit;
3224
3225 /*
3226 * do we also need to change the size of the file?
3227 */
3228 new_size = offset + len;
3229 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3230 eof = cpu_to_le64(new_size);
3231 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3232 cfile->fid.volatile_fid, cfile->pid, &eof);
3233 if (rc >= 0) {
3234 truncate_setsize(inode, new_size);
3235 fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3236 }
3237 }
3238
3239 zero_range_exit:
3240 filemap_invalidate_unlock(inode->i_mapping);
3241 inode_unlock(inode);
3242 free_xid(xid);
3243 if (rc)
3244 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3245 ses->Suid, offset, len, rc);
3246 else
3247 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3248 ses->Suid, offset, len);
3249 return rc;
3250 }
3251
3252 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3253 loff_t offset, loff_t len)
3254 {
3255 struct inode *inode = file_inode(file);
3256 struct cifsFileInfo *cfile = file->private_data;
3257 struct file_zero_data_information fsctl_buf;
3258 long rc;
3259 unsigned int xid;
3260 __u8 set_sparse = 1;
3261
3262 xid = get_xid();
3263
3264 inode_lock(inode);
3265 /* Need to make file sparse, if not already, before freeing range. */
3266 /* Consider adding equivalent for compressed since it could also work */
3267 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3268 rc = -EOPNOTSUPP;
3269 goto out;
3270 }
3271
3272 filemap_invalidate_lock(inode->i_mapping);
3273 /*
3274 * We implement the punch hole through ioctl, so we need remove the page
3275 * caches first, otherwise the data may be inconsistent with the server.
3276 */
3277 truncate_pagecache_range(inode, offset, offset + len - 1);
3278
3279 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3280
3281 fsctl_buf.FileOffset = cpu_to_le64(offset);
3282 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3283
3284 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3285 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3286 (char *)&fsctl_buf,
3287 sizeof(struct file_zero_data_information),
3288 CIFSMaxBufSize, NULL, NULL);
3289 filemap_invalidate_unlock(inode->i_mapping);
3290 out:
3291 inode_unlock(inode);
3292 free_xid(xid);
3293 return rc;
3294 }
3295
3296 static int smb3_simple_fallocate_write_range(unsigned int xid,
3297 struct cifs_tcon *tcon,
3298 struct cifsFileInfo *cfile,
3299 loff_t off, loff_t len,
3300 char *buf)
3301 {
3302 struct cifs_io_parms io_parms = {0};
3303 int nbytes;
3304 int rc = 0;
3305 struct kvec iov[2];
3306
3307 io_parms.netfid = cfile->fid.netfid;
3308 io_parms.pid = current->tgid;
3309 io_parms.tcon = tcon;
3310 io_parms.persistent_fid = cfile->fid.persistent_fid;
3311 io_parms.volatile_fid = cfile->fid.volatile_fid;
3312
3313 while (len) {
3314 io_parms.offset = off;
3315 io_parms.length = len;
3316 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3317 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3318 /* iov[0] is reserved for smb header */
3319 iov[1].iov_base = buf;
3320 iov[1].iov_len = io_parms.length;
3321 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3322 if (rc)
3323 break;
3324 if (nbytes > len)
3325 return -EINVAL;
3326 buf += nbytes;
3327 off += nbytes;
3328 len -= nbytes;
3329 }
3330 return rc;
3331 }
3332
3333 static int smb3_simple_fallocate_range(unsigned int xid,
3334 struct cifs_tcon *tcon,
3335 struct cifsFileInfo *cfile,
3336 loff_t off, loff_t len)
3337 {
3338 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3339 u32 out_data_len;
3340 char *buf = NULL;
3341 loff_t l;
3342 int rc;
3343
3344 in_data.file_offset = cpu_to_le64(off);
3345 in_data.length = cpu_to_le64(len);
3346 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3347 cfile->fid.volatile_fid,
3348 FSCTL_QUERY_ALLOCATED_RANGES,
3349 (char *)&in_data, sizeof(in_data),
3350 1024 * sizeof(struct file_allocated_range_buffer),
3351 (char **)&out_data, &out_data_len);
3352 if (rc)
3353 goto out;
3354
3355 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3356 if (buf == NULL) {
3357 rc = -ENOMEM;
3358 goto out;
3359 }
3360
3361 tmp_data = out_data;
3362 while (len) {
3363 /*
3364 * The rest of the region is unmapped so write it all.
3365 */
3366 if (out_data_len == 0) {
3367 rc = smb3_simple_fallocate_write_range(xid, tcon,
3368 cfile, off, len, buf);
3369 goto out;
3370 }
3371
3372 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3373 rc = -EINVAL;
3374 goto out;
3375 }
3376
3377 if (off < le64_to_cpu(tmp_data->file_offset)) {
3378 /*
3379 * We are at a hole. Write until the end of the region
3380 * or until the next allocated data,
3381 * whichever comes next.
3382 */
3383 l = le64_to_cpu(tmp_data->file_offset) - off;
3384 if (len < l)
3385 l = len;
3386 rc = smb3_simple_fallocate_write_range(xid, tcon,
3387 cfile, off, l, buf);
3388 if (rc)
3389 goto out;
3390 off = off + l;
3391 len = len - l;
3392 if (len == 0)
3393 goto out;
3394 }
3395 /*
3396 * We are at a section of allocated data, just skip forward
3397 * until the end of the data or the end of the region
3398 * we are supposed to fallocate, whichever comes first.
3399 */
3400 l = le64_to_cpu(tmp_data->length);
3401 if (len < l)
3402 l = len;
3403 off += l;
3404 len -= l;
3405
3406 tmp_data = &tmp_data[1];
3407 out_data_len -= sizeof(struct file_allocated_range_buffer);
3408 }
3409
3410 out:
3411 kfree(out_data);
3412 kfree(buf);
3413 return rc;
3414 }
3415
3416
3417 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3418 loff_t off, loff_t len, bool keep_size)
3419 {
3420 struct inode *inode;
3421 struct cifsInodeInfo *cifsi;
3422 struct cifsFileInfo *cfile = file->private_data;
3423 long rc = -EOPNOTSUPP;
3424 unsigned int xid;
3425 __le64 eof;
3426
3427 xid = get_xid();
3428
3429 inode = d_inode(cfile->dentry);
3430 cifsi = CIFS_I(inode);
3431
3432 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3433 tcon->ses->Suid, off, len);
3434 /* if file not oplocked can't be sure whether asking to extend size */
3435 if (!CIFS_CACHE_READ(cifsi))
3436 if (keep_size == false) {
3437 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3438 tcon->tid, tcon->ses->Suid, off, len, rc);
3439 free_xid(xid);
3440 return rc;
3441 }
3442
3443 /*
3444 * Extending the file
3445 */
3446 if ((keep_size == false) && i_size_read(inode) < off + len) {
3447 rc = inode_newsize_ok(inode, off + len);
3448 if (rc)
3449 goto out;
3450
3451 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3452 smb2_set_sparse(xid, tcon, cfile, inode, false);
3453
3454 eof = cpu_to_le64(off + len);
3455 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3456 cfile->fid.volatile_fid, cfile->pid, &eof);
3457 if (rc == 0) {
3458 cifsi->server_eof = off + len;
3459 cifs_setsize(inode, off + len);
3460 cifs_truncate_page(inode->i_mapping, inode->i_size);
3461 truncate_setsize(inode, off + len);
3462 }
3463 goto out;
3464 }
3465
3466 /*
3467 * Files are non-sparse by default so falloc may be a no-op
3468 * Must check if file sparse. If not sparse, and since we are not
3469 * extending then no need to do anything since file already allocated
3470 */
3471 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3472 rc = 0;
3473 goto out;
3474 }
3475
3476 if (keep_size == true) {
3477 /*
3478 * We can not preallocate pages beyond the end of the file
3479 * in SMB2
3480 */
3481 if (off >= i_size_read(inode)) {
3482 rc = 0;
3483 goto out;
3484 }
3485 /*
3486 * For fallocates that are partially beyond the end of file,
3487 * clamp len so we only fallocate up to the end of file.
3488 */
3489 if (off + len > i_size_read(inode)) {
3490 len = i_size_read(inode) - off;
3491 }
3492 }
3493
3494 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3495 /*
3496 * At this point, we are trying to fallocate an internal
3497 * regions of a sparse file. Since smb2 does not have a
3498 * fallocate command we have two otions on how to emulate this.
3499 * We can either turn the entire file to become non-sparse
3500 * which we only do if the fallocate is for virtually
3501 * the whole file, or we can overwrite the region with zeroes
3502 * using SMB2_write, which could be prohibitevly expensive
3503 * if len is large.
3504 */
3505 /*
3506 * We are only trying to fallocate a small region so
3507 * just write it with zero.
3508 */
3509 if (len <= 1024 * 1024) {
3510 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3511 off, len);
3512 goto out;
3513 }
3514
3515 /*
3516 * Check if falloc starts within first few pages of file
3517 * and ends within a few pages of the end of file to
3518 * ensure that most of file is being forced to be
3519 * fallocated now. If so then setting whole file sparse
3520 * ie potentially making a few extra pages at the beginning
3521 * or end of the file non-sparse via set_sparse is harmless.
3522 */
3523 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3524 rc = -EOPNOTSUPP;
3525 goto out;
3526 }
3527 }
3528
3529 smb2_set_sparse(xid, tcon, cfile, inode, false);
3530 rc = 0;
3531
3532 out:
3533 if (rc)
3534 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3535 tcon->ses->Suid, off, len, rc);
3536 else
3537 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3538 tcon->ses->Suid, off, len);
3539
3540 free_xid(xid);
3541 return rc;
3542 }
3543
3544 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3545 loff_t off, loff_t len)
3546 {
3547 int rc;
3548 unsigned int xid;
3549 struct inode *inode = file_inode(file);
3550 struct cifsFileInfo *cfile = file->private_data;
3551 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3552 __le64 eof;
3553 loff_t old_eof;
3554
3555 xid = get_xid();
3556
3557 inode_lock(inode);
3558
3559 old_eof = i_size_read(inode);
3560 if ((off >= old_eof) ||
3561 off + len >= old_eof) {
3562 rc = -EINVAL;
3563 goto out;
3564 }
3565
3566 filemap_invalidate_lock(inode->i_mapping);
3567 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3568 if (rc < 0)
3569 goto out_2;
3570
3571 truncate_pagecache_range(inode, off, old_eof);
3572
3573 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3574 old_eof - off - len, off);
3575 if (rc < 0)
3576 goto out_2;
3577
3578 eof = cpu_to_le64(old_eof - len);
3579 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3580 cfile->fid.volatile_fid, cfile->pid, &eof);
3581 if (rc < 0)
3582 goto out_2;
3583
3584 rc = 0;
3585
3586 cifsi->server_eof = i_size_read(inode) - len;
3587 truncate_setsize(inode, cifsi->server_eof);
3588 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3589 out_2:
3590 filemap_invalidate_unlock(inode->i_mapping);
3591 out:
3592 inode_unlock(inode);
3593 free_xid(xid);
3594 return rc;
3595 }
3596
3597 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3598 loff_t off, loff_t len)
3599 {
3600 int rc;
3601 unsigned int xid;
3602 struct cifsFileInfo *cfile = file->private_data;
3603 struct inode *inode = file_inode(file);
3604 __le64 eof;
3605 __u64 count, old_eof;
3606
3607 xid = get_xid();
3608
3609 inode_lock(inode);
3610
3611 old_eof = i_size_read(inode);
3612 if (off >= old_eof) {
3613 rc = -EINVAL;
3614 goto out;
3615 }
3616
3617 count = old_eof - off;
3618 eof = cpu_to_le64(old_eof + len);
3619
3620 filemap_invalidate_lock(inode->i_mapping);
3621 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3622 if (rc < 0)
3623 goto out_2;
3624 truncate_pagecache_range(inode, off, old_eof);
3625
3626 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3627 cfile->fid.volatile_fid, cfile->pid, &eof);
3628 if (rc < 0)
3629 goto out_2;
3630
3631 truncate_setsize(inode, old_eof + len);
3632 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3633
3634 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3635 if (rc < 0)
3636 goto out_2;
3637
3638 rc = smb3_zero_data(file, tcon, off, len, xid);
3639 if (rc < 0)
3640 goto out_2;
3641
3642 rc = 0;
3643 out_2:
3644 filemap_invalidate_unlock(inode->i_mapping);
3645 out:
3646 inode_unlock(inode);
3647 free_xid(xid);
3648 return rc;
3649 }
3650
3651 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3652 {
3653 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3654 struct cifsInodeInfo *cifsi;
3655 struct inode *inode;
3656 int rc = 0;
3657 struct file_allocated_range_buffer in_data, *out_data = NULL;
3658 u32 out_data_len;
3659 unsigned int xid;
3660
3661 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3662 return generic_file_llseek(file, offset, whence);
3663
3664 inode = d_inode(cfile->dentry);
3665 cifsi = CIFS_I(inode);
3666
3667 if (offset < 0 || offset >= i_size_read(inode))
3668 return -ENXIO;
3669
3670 xid = get_xid();
3671 /*
3672 * We need to be sure that all dirty pages are written as they
3673 * might fill holes on the server.
3674 * Note that we also MUST flush any written pages since at least
3675 * some servers (Windows2016) will not reflect recent writes in
3676 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3677 */
3678 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3679 if (wrcfile) {
3680 filemap_write_and_wait(inode->i_mapping);
3681 smb2_flush_file(xid, tcon, &wrcfile->fid);
3682 cifsFileInfo_put(wrcfile);
3683 }
3684
3685 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3686 if (whence == SEEK_HOLE)
3687 offset = i_size_read(inode);
3688 goto lseek_exit;
3689 }
3690
3691 in_data.file_offset = cpu_to_le64(offset);
3692 in_data.length = cpu_to_le64(i_size_read(inode));
3693
3694 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3695 cfile->fid.volatile_fid,
3696 FSCTL_QUERY_ALLOCATED_RANGES,
3697 (char *)&in_data, sizeof(in_data),
3698 sizeof(struct file_allocated_range_buffer),
3699 (char **)&out_data, &out_data_len);
3700 if (rc == -E2BIG)
3701 rc = 0;
3702 if (rc)
3703 goto lseek_exit;
3704
3705 if (whence == SEEK_HOLE && out_data_len == 0)
3706 goto lseek_exit;
3707
3708 if (whence == SEEK_DATA && out_data_len == 0) {
3709 rc = -ENXIO;
3710 goto lseek_exit;
3711 }
3712
3713 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3714 rc = -EINVAL;
3715 goto lseek_exit;
3716 }
3717 if (whence == SEEK_DATA) {
3718 offset = le64_to_cpu(out_data->file_offset);
3719 goto lseek_exit;
3720 }
3721 if (offset < le64_to_cpu(out_data->file_offset))
3722 goto lseek_exit;
3723
3724 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3725
3726 lseek_exit:
3727 free_xid(xid);
3728 kfree(out_data);
3729 if (!rc)
3730 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3731 else
3732 return rc;
3733 }
3734
3735 static int smb3_fiemap(struct cifs_tcon *tcon,
3736 struct cifsFileInfo *cfile,
3737 struct fiemap_extent_info *fei, u64 start, u64 len)
3738 {
3739 unsigned int xid;
3740 struct file_allocated_range_buffer in_data, *out_data;
3741 u32 out_data_len;
3742 int i, num, rc, flags, last_blob;
3743 u64 next;
3744
3745 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3746 if (rc)
3747 return rc;
3748
3749 xid = get_xid();
3750 again:
3751 in_data.file_offset = cpu_to_le64(start);
3752 in_data.length = cpu_to_le64(len);
3753
3754 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3755 cfile->fid.volatile_fid,
3756 FSCTL_QUERY_ALLOCATED_RANGES,
3757 (char *)&in_data, sizeof(in_data),
3758 1024 * sizeof(struct file_allocated_range_buffer),
3759 (char **)&out_data, &out_data_len);
3760 if (rc == -E2BIG) {
3761 last_blob = 0;
3762 rc = 0;
3763 } else
3764 last_blob = 1;
3765 if (rc)
3766 goto out;
3767
3768 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3769 rc = -EINVAL;
3770 goto out;
3771 }
3772 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3773 rc = -EINVAL;
3774 goto out;
3775 }
3776
3777 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3778 for (i = 0; i < num; i++) {
3779 flags = 0;
3780 if (i == num - 1 && last_blob)
3781 flags |= FIEMAP_EXTENT_LAST;
3782
3783 rc = fiemap_fill_next_extent(fei,
3784 le64_to_cpu(out_data[i].file_offset),
3785 le64_to_cpu(out_data[i].file_offset),
3786 le64_to_cpu(out_data[i].length),
3787 flags);
3788 if (rc < 0)
3789 goto out;
3790 if (rc == 1) {
3791 rc = 0;
3792 goto out;
3793 }
3794 }
3795
3796 if (!last_blob) {
3797 next = le64_to_cpu(out_data[num - 1].file_offset) +
3798 le64_to_cpu(out_data[num - 1].length);
3799 len = len - (next - start);
3800 start = next;
3801 goto again;
3802 }
3803
3804 out:
3805 free_xid(xid);
3806 kfree(out_data);
3807 return rc;
3808 }
3809
3810 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3811 loff_t off, loff_t len)
3812 {
3813 /* KEEP_SIZE already checked for by do_fallocate */
3814 if (mode & FALLOC_FL_PUNCH_HOLE)
3815 return smb3_punch_hole(file, tcon, off, len);
3816 else if (mode & FALLOC_FL_ZERO_RANGE) {
3817 if (mode & FALLOC_FL_KEEP_SIZE)
3818 return smb3_zero_range(file, tcon, off, len, true);
3819 return smb3_zero_range(file, tcon, off, len, false);
3820 } else if (mode == FALLOC_FL_KEEP_SIZE)
3821 return smb3_simple_falloc(file, tcon, off, len, true);
3822 else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3823 return smb3_collapse_range(file, tcon, off, len);
3824 else if (mode == FALLOC_FL_INSERT_RANGE)
3825 return smb3_insert_range(file, tcon, off, len);
3826 else if (mode == 0)
3827 return smb3_simple_falloc(file, tcon, off, len, false);
3828
3829 return -EOPNOTSUPP;
3830 }
3831
3832 static void
3833 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3834 struct cifsInodeInfo *cinode, __u32 oplock,
3835 unsigned int epoch, bool *purge_cache)
3836 {
3837 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3838 }
3839
3840 static void
3841 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3842 unsigned int epoch, bool *purge_cache);
3843
3844 static void
3845 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3846 struct cifsInodeInfo *cinode, __u32 oplock,
3847 unsigned int epoch, bool *purge_cache)
3848 {
3849 unsigned int old_state = cinode->oplock;
3850 unsigned int old_epoch = cinode->epoch;
3851 unsigned int new_state;
3852
3853 if (epoch > old_epoch) {
3854 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3855 cinode->epoch = epoch;
3856 }
3857
3858 new_state = cinode->oplock;
3859 *purge_cache = false;
3860
3861 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3862 (new_state & CIFS_CACHE_READ_FLG) == 0)
3863 *purge_cache = true;
3864 else if (old_state == new_state && (epoch - old_epoch > 1))
3865 *purge_cache = true;
3866 }
3867
3868 static void
3869 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3870 unsigned int epoch, bool *purge_cache)
3871 {
3872 oplock &= 0xFF;
3873 cinode->lease_granted = false;
3874 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3875 return;
3876 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3877 cinode->oplock = CIFS_CACHE_RHW_FLG;
3878 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3879 &cinode->netfs.inode);
3880 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3881 cinode->oplock = CIFS_CACHE_RW_FLG;
3882 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3883 &cinode->netfs.inode);
3884 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3885 cinode->oplock = CIFS_CACHE_READ_FLG;
3886 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3887 &cinode->netfs.inode);
3888 } else
3889 cinode->oplock = 0;
3890 }
3891
3892 static void
3893 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3894 unsigned int epoch, bool *purge_cache)
3895 {
3896 char message[5] = {0};
3897 unsigned int new_oplock = 0;
3898
3899 oplock &= 0xFF;
3900 cinode->lease_granted = true;
3901 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3902 return;
3903
3904 /* Check if the server granted an oplock rather than a lease */
3905 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3906 return smb2_set_oplock_level(cinode, oplock, epoch,
3907 purge_cache);
3908
3909 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3910 new_oplock |= CIFS_CACHE_READ_FLG;
3911 strcat(message, "R");
3912 }
3913 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3914 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3915 strcat(message, "H");
3916 }
3917 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3918 new_oplock |= CIFS_CACHE_WRITE_FLG;
3919 strcat(message, "W");
3920 }
3921 if (!new_oplock)
3922 strncpy(message, "None", sizeof(message));
3923
3924 cinode->oplock = new_oplock;
3925 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3926 &cinode->netfs.inode);
3927 }
3928
3929 static void
3930 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3931 unsigned int epoch, bool *purge_cache)
3932 {
3933 unsigned int old_oplock = cinode->oplock;
3934
3935 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3936
3937 if (purge_cache) {
3938 *purge_cache = false;
3939 if (old_oplock == CIFS_CACHE_READ_FLG) {
3940 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3941 (epoch - cinode->epoch > 0))
3942 *purge_cache = true;
3943 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3944 (epoch - cinode->epoch > 1))
3945 *purge_cache = true;
3946 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3947 (epoch - cinode->epoch > 1))
3948 *purge_cache = true;
3949 else if (cinode->oplock == 0 &&
3950 (epoch - cinode->epoch > 0))
3951 *purge_cache = true;
3952 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3953 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3954 (epoch - cinode->epoch > 0))
3955 *purge_cache = true;
3956 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3957 (epoch - cinode->epoch > 1))
3958 *purge_cache = true;
3959 }
3960 cinode->epoch = epoch;
3961 }
3962 }
3963
3964 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
3965 static bool
3966 smb2_is_read_op(__u32 oplock)
3967 {
3968 return oplock == SMB2_OPLOCK_LEVEL_II;
3969 }
3970 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
3971
3972 static bool
3973 smb21_is_read_op(__u32 oplock)
3974 {
3975 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3976 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3977 }
3978
3979 static __le32
3980 map_oplock_to_lease(u8 oplock)
3981 {
3982 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3983 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
3984 else if (oplock == SMB2_OPLOCK_LEVEL_II)
3985 return SMB2_LEASE_READ_CACHING_LE;
3986 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3987 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
3988 SMB2_LEASE_WRITE_CACHING_LE;
3989 return 0;
3990 }
3991
3992 static char *
3993 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3994 {
3995 struct create_lease *buf;
3996
3997 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3998 if (!buf)
3999 return NULL;
4000
4001 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4002 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4003
4004 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4005 (struct create_lease, lcontext));
4006 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4007 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4008 (struct create_lease, Name));
4009 buf->ccontext.NameLength = cpu_to_le16(4);
4010 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4011 buf->Name[0] = 'R';
4012 buf->Name[1] = 'q';
4013 buf->Name[2] = 'L';
4014 buf->Name[3] = 's';
4015 return (char *)buf;
4016 }
4017
4018 static char *
4019 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4020 {
4021 struct create_lease_v2 *buf;
4022
4023 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4024 if (!buf)
4025 return NULL;
4026
4027 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4028 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4029
4030 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4031 (struct create_lease_v2, lcontext));
4032 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4033 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4034 (struct create_lease_v2, Name));
4035 buf->ccontext.NameLength = cpu_to_le16(4);
4036 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4037 buf->Name[0] = 'R';
4038 buf->Name[1] = 'q';
4039 buf->Name[2] = 'L';
4040 buf->Name[3] = 's';
4041 return (char *)buf;
4042 }
4043
4044 static __u8
4045 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4046 {
4047 struct create_lease *lc = (struct create_lease *)buf;
4048
4049 *epoch = 0; /* not used */
4050 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4051 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4052 return le32_to_cpu(lc->lcontext.LeaseState);
4053 }
4054
4055 static __u8
4056 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4057 {
4058 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4059
4060 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4061 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4062 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4063 if (lease_key)
4064 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4065 return le32_to_cpu(lc->lcontext.LeaseState);
4066 }
4067
4068 static unsigned int
4069 smb2_wp_retry_size(struct inode *inode)
4070 {
4071 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4072 SMB2_MAX_BUFFER_SIZE);
4073 }
4074
4075 static bool
4076 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4077 {
4078 return !cfile->invalidHandle;
4079 }
4080
4081 static void
4082 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4083 struct smb_rqst *old_rq, __le16 cipher_type)
4084 {
4085 struct smb2_hdr *shdr =
4086 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4087
4088 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4089 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4090 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4091 tr_hdr->Flags = cpu_to_le16(0x01);
4092 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4093 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4094 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4095 else
4096 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4097 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4098 }
4099
4100 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4101 int num_rqst, const u8 *sig, u8 **iv,
4102 struct aead_request **req, struct sg_table *sgt,
4103 unsigned int *num_sgs, size_t *sensitive_size)
4104 {
4105 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4106 unsigned int iv_size = crypto_aead_ivsize(tfm);
4107 unsigned int len;
4108 u8 *p;
4109
4110 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4111 if (IS_ERR_VALUE((long)(int)*num_sgs))
4112 return ERR_PTR(*num_sgs);
4113
4114 len = iv_size;
4115 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4116 len = ALIGN(len, crypto_tfm_ctx_alignment());
4117 len += req_size;
4118 len = ALIGN(len, __alignof__(struct scatterlist));
4119 len += array_size(*num_sgs, sizeof(struct scatterlist));
4120 *sensitive_size = len;
4121
4122 p = kvzalloc(len, GFP_NOFS);
4123 if (!p)
4124 return ERR_PTR(-ENOMEM);
4125
4126 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4127 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4128 crypto_tfm_ctx_alignment());
4129 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4130 __alignof__(struct scatterlist));
4131 return p;
4132 }
4133
4134 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4135 int num_rqst, const u8 *sig, u8 **iv,
4136 struct aead_request **req, struct scatterlist **sgl,
4137 size_t *sensitive_size)
4138 {
4139 struct sg_table sgtable = {};
4140 unsigned int skip, num_sgs, i, j;
4141 ssize_t rc;
4142 void *p;
4143
4144 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4145 &num_sgs, sensitive_size);
4146 if (IS_ERR(p))
4147 return ERR_CAST(p);
4148
4149 sg_init_marker(sgtable.sgl, num_sgs);
4150
4151 /*
4152 * The first rqst has a transform header where the
4153 * first 20 bytes are not part of the encrypted blob.
4154 */
4155 skip = 20;
4156
4157 for (i = 0; i < num_rqst; i++) {
4158 struct iov_iter *iter = &rqst[i].rq_iter;
4159 size_t count = iov_iter_count(iter);
4160
4161 for (j = 0; j < rqst[i].rq_nvec; j++) {
4162 cifs_sg_set_buf(&sgtable,
4163 rqst[i].rq_iov[j].iov_base + skip,
4164 rqst[i].rq_iov[j].iov_len - skip);
4165
4166 /* See the above comment on the 'skip' assignment */
4167 skip = 0;
4168 }
4169 sgtable.orig_nents = sgtable.nents;
4170
4171 rc = extract_iter_to_sg(iter, count, &sgtable,
4172 num_sgs - sgtable.nents, 0);
4173 iov_iter_revert(iter, rc);
4174 sgtable.orig_nents = sgtable.nents;
4175 }
4176
4177 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4178 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4179 *sgl = sgtable.sgl;
4180 return p;
4181 }
4182
4183 static int
4184 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4185 {
4186 struct TCP_Server_Info *pserver;
4187 struct cifs_ses *ses;
4188 u8 *ses_enc_key;
4189
4190 /* If server is a channel, select the primary channel */
4191 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4192
4193 spin_lock(&cifs_tcp_ses_lock);
4194 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4195 if (ses->Suid == ses_id) {
4196 spin_lock(&ses->ses_lock);
4197 ses_enc_key = enc ? ses->smb3encryptionkey :
4198 ses->smb3decryptionkey;
4199 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4200 spin_unlock(&ses->ses_lock);
4201 spin_unlock(&cifs_tcp_ses_lock);
4202 return 0;
4203 }
4204 }
4205 spin_unlock(&cifs_tcp_ses_lock);
4206
4207 trace_smb3_ses_not_found(ses_id);
4208
4209 return -EAGAIN;
4210 }
4211 /*
4212 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4213 * iov[0] - transform header (associate data),
4214 * iov[1-N] - SMB2 header and pages - data to encrypt.
4215 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4216 * untouched.
4217 */
4218 static int
4219 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4220 struct smb_rqst *rqst, int enc)
4221 {
4222 struct smb2_transform_hdr *tr_hdr =
4223 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4224 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4225 int rc = 0;
4226 struct scatterlist *sg;
4227 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4228 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4229 struct aead_request *req;
4230 u8 *iv;
4231 DECLARE_CRYPTO_WAIT(wait);
4232 struct crypto_aead *tfm;
4233 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4234 void *creq;
4235 size_t sensitive_size;
4236
4237 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4238 if (rc) {
4239 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4240 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4241 return rc;
4242 }
4243
4244 rc = smb3_crypto_aead_allocate(server);
4245 if (rc) {
4246 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4247 return rc;
4248 }
4249
4250 tfm = enc ? server->secmech.enc : server->secmech.dec;
4251
4252 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4253 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4254 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4255 else
4256 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4257
4258 if (rc) {
4259 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4260 return rc;
4261 }
4262
4263 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4264 if (rc) {
4265 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4266 return rc;
4267 }
4268
4269 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4270 &sensitive_size);
4271 if (IS_ERR(creq))
4272 return PTR_ERR(creq);
4273
4274 if (!enc) {
4275 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4276 crypt_len += SMB2_SIGNATURE_SIZE;
4277 }
4278
4279 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4280 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4281 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4282 else {
4283 iv[0] = 3;
4284 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4285 }
4286
4287 aead_request_set_tfm(req, tfm);
4288 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4289 aead_request_set_ad(req, assoc_data_len);
4290
4291 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4292 crypto_req_done, &wait);
4293
4294 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4295 : crypto_aead_decrypt(req), &wait);
4296
4297 if (!rc && enc)
4298 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4299
4300 kvfree_sensitive(creq, sensitive_size);
4301 return rc;
4302 }
4303
4304 /*
4305 * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4306 */
4307 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4308 {
4309 struct folio *folio;
4310
4311 XA_STATE(xas, buffer, 0);
4312
4313 rcu_read_lock();
4314 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4315 folio_put(folio);
4316 }
4317 rcu_read_unlock();
4318 xa_destroy(buffer);
4319 }
4320
4321 void
4322 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4323 {
4324 int i;
4325
4326 for (i = 0; i < num_rqst; i++)
4327 if (!xa_empty(&rqst[i].rq_buffer))
4328 cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4329 }
4330
4331 /*
4332 * This function will initialize new_rq and encrypt the content.
4333 * The first entry, new_rq[0], only contains a single iov which contains
4334 * a smb2_transform_hdr and is pre-allocated by the caller.
4335 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4336 *
4337 * The end result is an array of smb_rqst structures where the first structure
4338 * only contains a single iov for the transform header which we then can pass
4339 * to crypt_message().
4340 *
4341 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4342 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4343 */
4344 static int
4345 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4346 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4347 {
4348 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4349 struct page *page;
4350 unsigned int orig_len = 0;
4351 int i, j;
4352 int rc = -ENOMEM;
4353
4354 for (i = 1; i < num_rqst; i++) {
4355 struct smb_rqst *old = &old_rq[i - 1];
4356 struct smb_rqst *new = &new_rq[i];
4357 struct xarray *buffer = &new->rq_buffer;
4358 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4359
4360 orig_len += smb_rqst_len(server, old);
4361 new->rq_iov = old->rq_iov;
4362 new->rq_nvec = old->rq_nvec;
4363
4364 xa_init(buffer);
4365
4366 if (size > 0) {
4367 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4368
4369 for (j = 0; j < npages; j++) {
4370 void *o;
4371
4372 rc = -ENOMEM;
4373 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4374 if (!page)
4375 goto err_free;
4376 page->index = j;
4377 o = xa_store(buffer, j, page, GFP_KERNEL);
4378 if (xa_is_err(o)) {
4379 rc = xa_err(o);
4380 put_page(page);
4381 goto err_free;
4382 }
4383
4384 xa_set_mark(buffer, j, XA_MARK_0);
4385
4386 seg = min_t(size_t, size - copied, PAGE_SIZE);
4387 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4388 rc = -EFAULT;
4389 goto err_free;
4390 }
4391 copied += seg;
4392 }
4393 iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4394 buffer, 0, size);
4395 new->rq_iter_size = size;
4396 }
4397 }
4398
4399 /* fill the 1st iov with a transform header */
4400 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4401
4402 rc = crypt_message(server, num_rqst, new_rq, 1);
4403 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4404 if (rc)
4405 goto err_free;
4406
4407 return rc;
4408
4409 err_free:
4410 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4411 return rc;
4412 }
4413
4414 static int
4415 smb3_is_transform_hdr(void *buf)
4416 {
4417 struct smb2_transform_hdr *trhdr = buf;
4418
4419 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4420 }
4421
4422 static int
4423 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4424 unsigned int buf_data_size, struct iov_iter *iter,
4425 bool is_offloaded)
4426 {
4427 struct kvec iov[2];
4428 struct smb_rqst rqst = {NULL};
4429 size_t iter_size = 0;
4430 int rc;
4431
4432 iov[0].iov_base = buf;
4433 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4434 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4435 iov[1].iov_len = buf_data_size;
4436
4437 rqst.rq_iov = iov;
4438 rqst.rq_nvec = 2;
4439 if (iter) {
4440 rqst.rq_iter = *iter;
4441 rqst.rq_iter_size = iov_iter_count(iter);
4442 iter_size = iov_iter_count(iter);
4443 }
4444
4445 rc = crypt_message(server, 1, &rqst, 0);
4446 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4447
4448 if (rc)
4449 return rc;
4450
4451 memmove(buf, iov[1].iov_base, buf_data_size);
4452
4453 if (!is_offloaded)
4454 server->total_read = buf_data_size + iter_size;
4455
4456 return rc;
4457 }
4458
4459 static int
4460 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4461 unsigned int skip, struct iov_iter *iter)
4462 {
4463 struct page *page;
4464 unsigned long index;
4465
4466 xa_for_each(pages, index, page) {
4467 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4468
4469 n = copy_page_to_iter(page, skip, len, iter);
4470 if (n != len) {
4471 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4472 return -EIO;
4473 }
4474 data_size -= n;
4475 skip = 0;
4476 }
4477
4478 return 0;
4479 }
4480
4481 static int
4482 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4483 char *buf, unsigned int buf_len, struct xarray *pages,
4484 unsigned int pages_len, bool is_offloaded)
4485 {
4486 unsigned int data_offset;
4487 unsigned int data_len;
4488 unsigned int cur_off;
4489 unsigned int cur_page_idx;
4490 unsigned int pad_len;
4491 struct cifs_readdata *rdata = mid->callback_data;
4492 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4493 int length;
4494 bool use_rdma_mr = false;
4495
4496 if (shdr->Command != SMB2_READ) {
4497 cifs_server_dbg(VFS, "only big read responses are supported\n");
4498 return -EOPNOTSUPP;
4499 }
4500
4501 if (server->ops->is_session_expired &&
4502 server->ops->is_session_expired(buf)) {
4503 if (!is_offloaded)
4504 cifs_reconnect(server, true);
4505 return -1;
4506 }
4507
4508 if (server->ops->is_status_pending &&
4509 server->ops->is_status_pending(buf, server))
4510 return -1;
4511
4512 /* set up first two iov to get credits */
4513 rdata->iov[0].iov_base = buf;
4514 rdata->iov[0].iov_len = 0;
4515 rdata->iov[1].iov_base = buf;
4516 rdata->iov[1].iov_len =
4517 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4518 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4519 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4520 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4521 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4522
4523 rdata->result = server->ops->map_error(buf, true);
4524 if (rdata->result != 0) {
4525 cifs_dbg(FYI, "%s: server returned error %d\n",
4526 __func__, rdata->result);
4527 /* normal error on read response */
4528 if (is_offloaded)
4529 mid->mid_state = MID_RESPONSE_RECEIVED;
4530 else
4531 dequeue_mid(mid, false);
4532 return 0;
4533 }
4534
4535 data_offset = server->ops->read_data_offset(buf);
4536 #ifdef CONFIG_CIFS_SMB_DIRECT
4537 use_rdma_mr = rdata->mr;
4538 #endif
4539 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4540
4541 if (data_offset < server->vals->read_rsp_size) {
4542 /*
4543 * win2k8 sometimes sends an offset of 0 when the read
4544 * is beyond the EOF. Treat it as if the data starts just after
4545 * the header.
4546 */
4547 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4548 __func__, data_offset);
4549 data_offset = server->vals->read_rsp_size;
4550 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4551 /* data_offset is beyond the end of smallbuf */
4552 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4553 __func__, data_offset);
4554 rdata->result = -EIO;
4555 if (is_offloaded)
4556 mid->mid_state = MID_RESPONSE_MALFORMED;
4557 else
4558 dequeue_mid(mid, rdata->result);
4559 return 0;
4560 }
4561
4562 pad_len = data_offset - server->vals->read_rsp_size;
4563
4564 if (buf_len <= data_offset) {
4565 /* read response payload is in pages */
4566 cur_page_idx = pad_len / PAGE_SIZE;
4567 cur_off = pad_len % PAGE_SIZE;
4568
4569 if (cur_page_idx != 0) {
4570 /* data offset is beyond the 1st page of response */
4571 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4572 __func__, data_offset);
4573 rdata->result = -EIO;
4574 if (is_offloaded)
4575 mid->mid_state = MID_RESPONSE_MALFORMED;
4576 else
4577 dequeue_mid(mid, rdata->result);
4578 return 0;
4579 }
4580
4581 if (data_len > pages_len - pad_len) {
4582 /* data_len is corrupt -- discard frame */
4583 rdata->result = -EIO;
4584 if (is_offloaded)
4585 mid->mid_state = MID_RESPONSE_MALFORMED;
4586 else
4587 dequeue_mid(mid, rdata->result);
4588 return 0;
4589 }
4590
4591 /* Copy the data to the output I/O iterator. */
4592 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4593 cur_off, &rdata->iter);
4594 if (rdata->result != 0) {
4595 if (is_offloaded)
4596 mid->mid_state = MID_RESPONSE_MALFORMED;
4597 else
4598 dequeue_mid(mid, rdata->result);
4599 return 0;
4600 }
4601 rdata->got_bytes = pages_len;
4602
4603 } else if (buf_len >= data_offset + data_len) {
4604 /* read response payload is in buf */
4605 WARN_ONCE(pages && !xa_empty(pages),
4606 "read data can be either in buf or in pages");
4607 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4608 if (length < 0)
4609 return length;
4610 rdata->got_bytes = data_len;
4611 } else {
4612 /* read response payload cannot be in both buf and pages */
4613 WARN_ONCE(1, "buf can not contain only a part of read data");
4614 rdata->result = -EIO;
4615 if (is_offloaded)
4616 mid->mid_state = MID_RESPONSE_MALFORMED;
4617 else
4618 dequeue_mid(mid, rdata->result);
4619 return 0;
4620 }
4621
4622 if (is_offloaded)
4623 mid->mid_state = MID_RESPONSE_RECEIVED;
4624 else
4625 dequeue_mid(mid, false);
4626 return 0;
4627 }
4628
4629 struct smb2_decrypt_work {
4630 struct work_struct decrypt;
4631 struct TCP_Server_Info *server;
4632 struct xarray buffer;
4633 char *buf;
4634 unsigned int len;
4635 };
4636
4637
4638 static void smb2_decrypt_offload(struct work_struct *work)
4639 {
4640 struct smb2_decrypt_work *dw = container_of(work,
4641 struct smb2_decrypt_work, decrypt);
4642 int rc;
4643 struct mid_q_entry *mid;
4644 struct iov_iter iter;
4645
4646 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4647 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4648 &iter, true);
4649 if (rc) {
4650 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4651 goto free_pages;
4652 }
4653
4654 dw->server->lstrp = jiffies;
4655 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4656 if (mid == NULL)
4657 cifs_dbg(FYI, "mid not found\n");
4658 else {
4659 mid->decrypted = true;
4660 rc = handle_read_data(dw->server, mid, dw->buf,
4661 dw->server->vals->read_rsp_size,
4662 &dw->buffer, dw->len,
4663 true);
4664 if (rc >= 0) {
4665 #ifdef CONFIG_CIFS_STATS2
4666 mid->when_received = jiffies;
4667 #endif
4668 if (dw->server->ops->is_network_name_deleted)
4669 dw->server->ops->is_network_name_deleted(dw->buf,
4670 dw->server);
4671
4672 mid->callback(mid);
4673 } else {
4674 spin_lock(&dw->server->srv_lock);
4675 if (dw->server->tcpStatus == CifsNeedReconnect) {
4676 spin_lock(&dw->server->mid_lock);
4677 mid->mid_state = MID_RETRY_NEEDED;
4678 spin_unlock(&dw->server->mid_lock);
4679 spin_unlock(&dw->server->srv_lock);
4680 mid->callback(mid);
4681 } else {
4682 spin_lock(&dw->server->mid_lock);
4683 mid->mid_state = MID_REQUEST_SUBMITTED;
4684 mid->mid_flags &= ~(MID_DELETED);
4685 list_add_tail(&mid->qhead,
4686 &dw->server->pending_mid_q);
4687 spin_unlock(&dw->server->mid_lock);
4688 spin_unlock(&dw->server->srv_lock);
4689 }
4690 }
4691 release_mid(mid);
4692 }
4693
4694 free_pages:
4695 cifs_clear_xarray_buffer(&dw->buffer);
4696 cifs_small_buf_release(dw->buf);
4697 kfree(dw);
4698 }
4699
4700
4701 static int
4702 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4703 int *num_mids)
4704 {
4705 struct page *page;
4706 char *buf = server->smallbuf;
4707 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4708 struct iov_iter iter;
4709 unsigned int len, npages;
4710 unsigned int buflen = server->pdu_size;
4711 int rc;
4712 int i = 0;
4713 struct smb2_decrypt_work *dw;
4714
4715 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4716 if (!dw)
4717 return -ENOMEM;
4718 xa_init(&dw->buffer);
4719 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4720 dw->server = server;
4721
4722 *num_mids = 1;
4723 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4724 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4725
4726 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4727 if (rc < 0)
4728 goto free_dw;
4729 server->total_read += rc;
4730
4731 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4732 server->vals->read_rsp_size;
4733 dw->len = len;
4734 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4735
4736 rc = -ENOMEM;
4737 for (; i < npages; i++) {
4738 void *old;
4739
4740 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4741 if (!page)
4742 goto discard_data;
4743 page->index = i;
4744 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4745 if (xa_is_err(old)) {
4746 rc = xa_err(old);
4747 put_page(page);
4748 goto discard_data;
4749 }
4750 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4751 }
4752
4753 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4754
4755 /* Read the data into the buffer and clear excess bufferage. */
4756 rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4757 if (rc < 0)
4758 goto discard_data;
4759
4760 server->total_read += rc;
4761 if (rc < npages * PAGE_SIZE)
4762 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4763 iov_iter_revert(&iter, npages * PAGE_SIZE);
4764 iov_iter_truncate(&iter, dw->len);
4765
4766 rc = cifs_discard_remaining_data(server);
4767 if (rc)
4768 goto free_pages;
4769
4770 /*
4771 * For large reads, offload to different thread for better performance,
4772 * use more cores decrypting which can be expensive
4773 */
4774
4775 if ((server->min_offload) && (server->in_flight > 1) &&
4776 (server->pdu_size >= server->min_offload)) {
4777 dw->buf = server->smallbuf;
4778 server->smallbuf = (char *)cifs_small_buf_get();
4779
4780 queue_work(decrypt_wq, &dw->decrypt);
4781 *num_mids = 0; /* worker thread takes care of finding mid */
4782 return -1;
4783 }
4784
4785 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4786 &iter, false);
4787 if (rc)
4788 goto free_pages;
4789
4790 *mid = smb2_find_mid(server, buf);
4791 if (*mid == NULL) {
4792 cifs_dbg(FYI, "mid not found\n");
4793 } else {
4794 cifs_dbg(FYI, "mid found\n");
4795 (*mid)->decrypted = true;
4796 rc = handle_read_data(server, *mid, buf,
4797 server->vals->read_rsp_size,
4798 &dw->buffer, dw->len, false);
4799 if (rc >= 0) {
4800 if (server->ops->is_network_name_deleted) {
4801 server->ops->is_network_name_deleted(buf,
4802 server);
4803 }
4804 }
4805 }
4806
4807 free_pages:
4808 cifs_clear_xarray_buffer(&dw->buffer);
4809 free_dw:
4810 kfree(dw);
4811 return rc;
4812 discard_data:
4813 cifs_discard_remaining_data(server);
4814 goto free_pages;
4815 }
4816
4817 static int
4818 receive_encrypted_standard(struct TCP_Server_Info *server,
4819 struct mid_q_entry **mids, char **bufs,
4820 int *num_mids)
4821 {
4822 int ret, length;
4823 char *buf = server->smallbuf;
4824 struct smb2_hdr *shdr;
4825 unsigned int pdu_length = server->pdu_size;
4826 unsigned int buf_size;
4827 unsigned int next_cmd;
4828 struct mid_q_entry *mid_entry;
4829 int next_is_large;
4830 char *next_buffer = NULL;
4831
4832 *num_mids = 0;
4833
4834 /* switch to large buffer if too big for a small one */
4835 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4836 server->large_buf = true;
4837 memcpy(server->bigbuf, buf, server->total_read);
4838 buf = server->bigbuf;
4839 }
4840
4841 /* now read the rest */
4842 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4843 pdu_length - HEADER_SIZE(server) + 1);
4844 if (length < 0)
4845 return length;
4846 server->total_read += length;
4847
4848 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4849 length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4850 if (length)
4851 return length;
4852
4853 next_is_large = server->large_buf;
4854 one_more:
4855 shdr = (struct smb2_hdr *)buf;
4856 next_cmd = le32_to_cpu(shdr->NextCommand);
4857 if (next_cmd) {
4858 if (WARN_ON_ONCE(next_cmd > pdu_length))
4859 return -1;
4860 if (next_is_large)
4861 next_buffer = (char *)cifs_buf_get();
4862 else
4863 next_buffer = (char *)cifs_small_buf_get();
4864 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4865 }
4866
4867 mid_entry = smb2_find_mid(server, buf);
4868 if (mid_entry == NULL)
4869 cifs_dbg(FYI, "mid not found\n");
4870 else {
4871 cifs_dbg(FYI, "mid found\n");
4872 mid_entry->decrypted = true;
4873 mid_entry->resp_buf_size = server->pdu_size;
4874 }
4875
4876 if (*num_mids >= MAX_COMPOUND) {
4877 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4878 return -1;
4879 }
4880 bufs[*num_mids] = buf;
4881 mids[(*num_mids)++] = mid_entry;
4882
4883 if (mid_entry && mid_entry->handle)
4884 ret = mid_entry->handle(server, mid_entry);
4885 else
4886 ret = cifs_handle_standard(server, mid_entry);
4887
4888 if (ret == 0 && next_cmd) {
4889 pdu_length -= next_cmd;
4890 server->large_buf = next_is_large;
4891 if (next_is_large)
4892 server->bigbuf = buf = next_buffer;
4893 else
4894 server->smallbuf = buf = next_buffer;
4895 goto one_more;
4896 } else if (ret != 0) {
4897 /*
4898 * ret != 0 here means that we didn't get to handle_mid() thus
4899 * server->smallbuf and server->bigbuf are still valid. We need
4900 * to free next_buffer because it is not going to be used
4901 * anywhere.
4902 */
4903 if (next_is_large)
4904 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4905 else
4906 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4907 }
4908
4909 return ret;
4910 }
4911
4912 static int
4913 smb3_receive_transform(struct TCP_Server_Info *server,
4914 struct mid_q_entry **mids, char **bufs, int *num_mids)
4915 {
4916 char *buf = server->smallbuf;
4917 unsigned int pdu_length = server->pdu_size;
4918 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4919 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4920
4921 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4922 sizeof(struct smb2_hdr)) {
4923 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4924 pdu_length);
4925 cifs_reconnect(server, true);
4926 return -ECONNABORTED;
4927 }
4928
4929 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4930 cifs_server_dbg(VFS, "Transform message is broken\n");
4931 cifs_reconnect(server, true);
4932 return -ECONNABORTED;
4933 }
4934
4935 /* TODO: add support for compounds containing READ. */
4936 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4937 return receive_encrypted_read(server, &mids[0], num_mids);
4938 }
4939
4940 return receive_encrypted_standard(server, mids, bufs, num_mids);
4941 }
4942
4943 int
4944 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4945 {
4946 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4947
4948 return handle_read_data(server, mid, buf, server->pdu_size,
4949 NULL, 0, false);
4950 }
4951
4952 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
4953 unsigned int *noff)
4954 {
4955 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
4956 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4957
4958 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
4959 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
4960 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
4961 return -EINVAL;
4962 } else {
4963 *noff = le32_to_cpu(hdr->NextCommand);
4964 }
4965 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
4966 return -EINVAL;
4967 return 0;
4968 }
4969
4970 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
4971 struct dentry *dentry, struct cifs_tcon *tcon,
4972 const char *full_path, umode_t mode, dev_t dev)
4973 {
4974 struct cifs_open_info_data buf = {};
4975 struct TCP_Server_Info *server = tcon->ses->server;
4976 struct cifs_open_parms oparms;
4977 struct cifs_io_parms io_parms = {};
4978 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4979 struct cifs_fid fid;
4980 unsigned int bytes_written;
4981 struct win_dev *pdev;
4982 struct kvec iov[2];
4983 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
4984 int rc;
4985
4986 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
4987 return -EPERM;
4988
4989 oparms = (struct cifs_open_parms) {
4990 .tcon = tcon,
4991 .cifs_sb = cifs_sb,
4992 .desired_access = GENERIC_WRITE,
4993 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4994 CREATE_OPTION_SPECIAL),
4995 .disposition = FILE_CREATE,
4996 .path = full_path,
4997 .fid = &fid,
4998 };
4999
5000 rc = server->ops->open(xid, &oparms, &oplock, &buf);
5001 if (rc)
5002 return rc;
5003
5004 /*
5005 * BB Do not bother to decode buf since no local inode yet to put
5006 * timestamps in, but we can reuse it safely.
5007 */
5008 pdev = (struct win_dev *)&buf.fi;
5009 io_parms.pid = current->tgid;
5010 io_parms.tcon = tcon;
5011 io_parms.length = sizeof(*pdev);
5012 iov[1].iov_base = pdev;
5013 iov[1].iov_len = sizeof(*pdev);
5014 if (S_ISCHR(mode)) {
5015 memcpy(pdev->type, "IntxCHR", 8);
5016 pdev->major = cpu_to_le64(MAJOR(dev));
5017 pdev->minor = cpu_to_le64(MINOR(dev));
5018 } else if (S_ISBLK(mode)) {
5019 memcpy(pdev->type, "IntxBLK", 8);
5020 pdev->major = cpu_to_le64(MAJOR(dev));
5021 pdev->minor = cpu_to_le64(MINOR(dev));
5022 } else if (S_ISFIFO(mode)) {
5023 memcpy(pdev->type, "LnxFIFO", 8);
5024 }
5025
5026 rc = server->ops->sync_write(xid, &fid, &io_parms,
5027 &bytes_written, iov, 1);
5028 server->ops->close(xid, tcon, &fid);
5029 d_drop(dentry);
5030 /* FIXME: add code here to set EAs */
5031 cifs_free_open_info(&buf);
5032 return rc;
5033 }
5034
5035 static inline u64 mode_nfs_type(mode_t mode)
5036 {
5037 switch (mode & S_IFMT) {
5038 case S_IFBLK: return NFS_SPECFILE_BLK;
5039 case S_IFCHR: return NFS_SPECFILE_CHR;
5040 case S_IFIFO: return NFS_SPECFILE_FIFO;
5041 case S_IFSOCK: return NFS_SPECFILE_SOCK;
5042 }
5043 return 0;
5044 }
5045
5046 static int nfs_set_reparse_buf(struct reparse_posix_data *buf,
5047 mode_t mode, dev_t dev,
5048 struct kvec *iov)
5049 {
5050 u64 type;
5051 u16 len, dlen;
5052
5053 len = sizeof(*buf);
5054
5055 switch ((type = mode_nfs_type(mode))) {
5056 case NFS_SPECFILE_BLK:
5057 case NFS_SPECFILE_CHR:
5058 dlen = sizeof(__le64);
5059 break;
5060 case NFS_SPECFILE_FIFO:
5061 case NFS_SPECFILE_SOCK:
5062 dlen = 0;
5063 break;
5064 default:
5065 return -EOPNOTSUPP;
5066 }
5067
5068 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_NFS);
5069 buf->Reserved = 0;
5070 buf->InodeType = cpu_to_le64(type);
5071 buf->ReparseDataLength = cpu_to_le16(len + dlen -
5072 sizeof(struct reparse_data_buffer));
5073 *(__le64 *)buf->DataBuffer = cpu_to_le64(((u64)MAJOR(dev) << 32) |
5074 MINOR(dev));
5075 iov->iov_base = buf;
5076 iov->iov_len = len + dlen;
5077 return 0;
5078 }
5079
5080 static int nfs_make_node(unsigned int xid, struct inode *inode,
5081 struct dentry *dentry, struct cifs_tcon *tcon,
5082 const char *full_path, umode_t mode, dev_t dev)
5083 {
5084 struct cifs_open_info_data data;
5085 struct reparse_posix_data *p;
5086 struct inode *new;
5087 struct kvec iov;
5088 __u8 buf[sizeof(*p) + sizeof(__le64)];
5089 int rc;
5090
5091 p = (struct reparse_posix_data *)buf;
5092 rc = nfs_set_reparse_buf(p, mode, dev, &iov);
5093 if (rc)
5094 return rc;
5095
5096 data = (struct cifs_open_info_data) {
5097 .reparse_point = true,
5098 .reparse = { .tag = IO_REPARSE_TAG_NFS, .posix = p, },
5099 };
5100
5101 new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
5102 tcon, full_path, &iov);
5103 if (!IS_ERR(new))
5104 d_instantiate(dentry, new);
5105 else
5106 rc = PTR_ERR(new);
5107 cifs_free_open_info(&data);
5108 return rc;
5109 }
5110
5111 static int smb2_create_reparse_symlink(const unsigned int xid,
5112 struct inode *inode,
5113 struct dentry *dentry,
5114 struct cifs_tcon *tcon,
5115 const char *full_path,
5116 const char *symname)
5117 {
5118 struct reparse_symlink_data_buffer *buf = NULL;
5119 struct cifs_open_info_data data;
5120 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5121 struct inode *new;
5122 struct kvec iov;
5123 __le16 *path;
5124 char *sym;
5125 u16 len, plen;
5126 int rc = 0;
5127
5128 sym = kstrdup(symname, GFP_KERNEL);
5129 if (!sym)
5130 return -ENOMEM;
5131
5132 data = (struct cifs_open_info_data) {
5133 .reparse_point = true,
5134 .reparse = { .tag = IO_REPARSE_TAG_SYMLINK, },
5135 .symlink_target = sym,
5136 };
5137
5138 path = cifs_convert_path_to_utf16(symname, cifs_sb);
5139 if (!path) {
5140 rc = -ENOMEM;
5141 goto out;
5142 }
5143
5144 plen = 2 * UniStrnlen((wchar_t *)path, PATH_MAX);
5145 len = sizeof(*buf) + plen * 2;
5146 buf = kzalloc(len, GFP_KERNEL);
5147 if (!buf) {
5148 rc = -ENOMEM;
5149 goto out;
5150 }
5151
5152 buf->ReparseTag = cpu_to_le32(IO_REPARSE_TAG_SYMLINK);
5153 buf->ReparseDataLength = cpu_to_le16(len - sizeof(struct reparse_data_buffer));
5154 buf->SubstituteNameOffset = cpu_to_le16(plen);
5155 buf->SubstituteNameLength = cpu_to_le16(plen);
5156 memcpy(&buf->PathBuffer[plen], path, plen);
5157 buf->PrintNameOffset = 0;
5158 buf->PrintNameLength = cpu_to_le16(plen);
5159 memcpy(buf->PathBuffer, path, plen);
5160 buf->Flags = cpu_to_le32(*symname != '/' ? SYMLINK_FLAG_RELATIVE : 0);
5161
5162 iov.iov_base = buf;
5163 iov.iov_len = len;
5164 new = smb2_get_reparse_inode(&data, inode->i_sb, xid,
5165 tcon, full_path, &iov);
5166 if (!IS_ERR(new))
5167 d_instantiate(dentry, new);
5168 else
5169 rc = PTR_ERR(new);
5170 out:
5171 kfree(path);
5172 cifs_free_open_info(&data);
5173 kfree(buf);
5174 return rc;
5175 }
5176
5177 static int smb2_make_node(unsigned int xid, struct inode *inode,
5178 struct dentry *dentry, struct cifs_tcon *tcon,
5179 const char *full_path, umode_t mode, dev_t dev)
5180 {
5181 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5182 int rc;
5183
5184 /*
5185 * Check if mounted with mount parm 'sfu' mount parm.
5186 * SFU emulation should work with all servers, but only
5187 * supports block and char device (no socket & fifo),
5188 * and was used by default in earlier versions of Windows
5189 */
5190 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
5191 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
5192 full_path, mode, dev);
5193 } else {
5194 rc = nfs_make_node(xid, inode, dentry, tcon,
5195 full_path, mode, dev);
5196 }
5197 return rc;
5198 }
5199
5200 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5201 struct smb_version_operations smb20_operations = {
5202 .compare_fids = smb2_compare_fids,
5203 .setup_request = smb2_setup_request,
5204 .setup_async_request = smb2_setup_async_request,
5205 .check_receive = smb2_check_receive,
5206 .add_credits = smb2_add_credits,
5207 .set_credits = smb2_set_credits,
5208 .get_credits_field = smb2_get_credits_field,
5209 .get_credits = smb2_get_credits,
5210 .wait_mtu_credits = cifs_wait_mtu_credits,
5211 .get_next_mid = smb2_get_next_mid,
5212 .revert_current_mid = smb2_revert_current_mid,
5213 .read_data_offset = smb2_read_data_offset,
5214 .read_data_length = smb2_read_data_length,
5215 .map_error = map_smb2_to_linux_error,
5216 .find_mid = smb2_find_mid,
5217 .check_message = smb2_check_message,
5218 .dump_detail = smb2_dump_detail,
5219 .clear_stats = smb2_clear_stats,
5220 .print_stats = smb2_print_stats,
5221 .is_oplock_break = smb2_is_valid_oplock_break,
5222 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5223 .downgrade_oplock = smb2_downgrade_oplock,
5224 .need_neg = smb2_need_neg,
5225 .negotiate = smb2_negotiate,
5226 .negotiate_wsize = smb2_negotiate_wsize,
5227 .negotiate_rsize = smb2_negotiate_rsize,
5228 .sess_setup = SMB2_sess_setup,
5229 .logoff = SMB2_logoff,
5230 .tree_connect = SMB2_tcon,
5231 .tree_disconnect = SMB2_tdis,
5232 .qfs_tcon = smb2_qfs_tcon,
5233 .is_path_accessible = smb2_is_path_accessible,
5234 .can_echo = smb2_can_echo,
5235 .echo = SMB2_echo,
5236 .query_path_info = smb2_query_path_info,
5237 .query_reparse_point = smb2_query_reparse_point,
5238 .get_srv_inum = smb2_get_srv_inum,
5239 .query_file_info = smb2_query_file_info,
5240 .set_path_size = smb2_set_path_size,
5241 .set_file_size = smb2_set_file_size,
5242 .set_file_info = smb2_set_file_info,
5243 .set_compression = smb2_set_compression,
5244 .mkdir = smb2_mkdir,
5245 .mkdir_setinfo = smb2_mkdir_setinfo,
5246 .rmdir = smb2_rmdir,
5247 .unlink = smb2_unlink,
5248 .rename = smb2_rename_path,
5249 .create_hardlink = smb2_create_hardlink,
5250 .parse_reparse_point = smb2_parse_reparse_point,
5251 .query_mf_symlink = smb3_query_mf_symlink,
5252 .create_mf_symlink = smb3_create_mf_symlink,
5253 .create_reparse_symlink = smb2_create_reparse_symlink,
5254 .open = smb2_open_file,
5255 .set_fid = smb2_set_fid,
5256 .close = smb2_close_file,
5257 .flush = smb2_flush_file,
5258 .async_readv = smb2_async_readv,
5259 .async_writev = smb2_async_writev,
5260 .sync_read = smb2_sync_read,
5261 .sync_write = smb2_sync_write,
5262 .query_dir_first = smb2_query_dir_first,
5263 .query_dir_next = smb2_query_dir_next,
5264 .close_dir = smb2_close_dir,
5265 .calc_smb_size = smb2_calc_size,
5266 .is_status_pending = smb2_is_status_pending,
5267 .is_session_expired = smb2_is_session_expired,
5268 .oplock_response = smb2_oplock_response,
5269 .queryfs = smb2_queryfs,
5270 .mand_lock = smb2_mand_lock,
5271 .mand_unlock_range = smb2_unlock_range,
5272 .push_mand_locks = smb2_push_mandatory_locks,
5273 .get_lease_key = smb2_get_lease_key,
5274 .set_lease_key = smb2_set_lease_key,
5275 .new_lease_key = smb2_new_lease_key,
5276 .calc_signature = smb2_calc_signature,
5277 .is_read_op = smb2_is_read_op,
5278 .set_oplock_level = smb2_set_oplock_level,
5279 .create_lease_buf = smb2_create_lease_buf,
5280 .parse_lease_buf = smb2_parse_lease_buf,
5281 .copychunk_range = smb2_copychunk_range,
5282 .wp_retry_size = smb2_wp_retry_size,
5283 .dir_needs_close = smb2_dir_needs_close,
5284 .get_dfs_refer = smb2_get_dfs_refer,
5285 .select_sectype = smb2_select_sectype,
5286 #ifdef CONFIG_CIFS_XATTR
5287 .query_all_EAs = smb2_query_eas,
5288 .set_EA = smb2_set_ea,
5289 #endif /* CIFS_XATTR */
5290 .get_acl = get_smb2_acl,
5291 .get_acl_by_fid = get_smb2_acl_by_fid,
5292 .set_acl = set_smb2_acl,
5293 .next_header = smb2_next_header,
5294 .ioctl_query_info = smb2_ioctl_query_info,
5295 .make_node = smb2_make_node,
5296 .fiemap = smb3_fiemap,
5297 .llseek = smb3_llseek,
5298 .is_status_io_timeout = smb2_is_status_io_timeout,
5299 .is_network_name_deleted = smb2_is_network_name_deleted,
5300 };
5301 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5302
5303 struct smb_version_operations smb21_operations = {
5304 .compare_fids = smb2_compare_fids,
5305 .setup_request = smb2_setup_request,
5306 .setup_async_request = smb2_setup_async_request,
5307 .check_receive = smb2_check_receive,
5308 .add_credits = smb2_add_credits,
5309 .set_credits = smb2_set_credits,
5310 .get_credits_field = smb2_get_credits_field,
5311 .get_credits = smb2_get_credits,
5312 .wait_mtu_credits = smb2_wait_mtu_credits,
5313 .adjust_credits = smb2_adjust_credits,
5314 .get_next_mid = smb2_get_next_mid,
5315 .revert_current_mid = smb2_revert_current_mid,
5316 .read_data_offset = smb2_read_data_offset,
5317 .read_data_length = smb2_read_data_length,
5318 .map_error = map_smb2_to_linux_error,
5319 .find_mid = smb2_find_mid,
5320 .check_message = smb2_check_message,
5321 .dump_detail = smb2_dump_detail,
5322 .clear_stats = smb2_clear_stats,
5323 .print_stats = smb2_print_stats,
5324 .is_oplock_break = smb2_is_valid_oplock_break,
5325 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5326 .downgrade_oplock = smb2_downgrade_oplock,
5327 .need_neg = smb2_need_neg,
5328 .negotiate = smb2_negotiate,
5329 .negotiate_wsize = smb2_negotiate_wsize,
5330 .negotiate_rsize = smb2_negotiate_rsize,
5331 .sess_setup = SMB2_sess_setup,
5332 .logoff = SMB2_logoff,
5333 .tree_connect = SMB2_tcon,
5334 .tree_disconnect = SMB2_tdis,
5335 .qfs_tcon = smb2_qfs_tcon,
5336 .is_path_accessible = smb2_is_path_accessible,
5337 .can_echo = smb2_can_echo,
5338 .echo = SMB2_echo,
5339 .query_path_info = smb2_query_path_info,
5340 .query_reparse_point = smb2_query_reparse_point,
5341 .get_srv_inum = smb2_get_srv_inum,
5342 .query_file_info = smb2_query_file_info,
5343 .set_path_size = smb2_set_path_size,
5344 .set_file_size = smb2_set_file_size,
5345 .set_file_info = smb2_set_file_info,
5346 .set_compression = smb2_set_compression,
5347 .mkdir = smb2_mkdir,
5348 .mkdir_setinfo = smb2_mkdir_setinfo,
5349 .rmdir = smb2_rmdir,
5350 .unlink = smb2_unlink,
5351 .rename = smb2_rename_path,
5352 .create_hardlink = smb2_create_hardlink,
5353 .parse_reparse_point = smb2_parse_reparse_point,
5354 .query_mf_symlink = smb3_query_mf_symlink,
5355 .create_mf_symlink = smb3_create_mf_symlink,
5356 .create_reparse_symlink = smb2_create_reparse_symlink,
5357 .open = smb2_open_file,
5358 .set_fid = smb2_set_fid,
5359 .close = smb2_close_file,
5360 .flush = smb2_flush_file,
5361 .async_readv = smb2_async_readv,
5362 .async_writev = smb2_async_writev,
5363 .sync_read = smb2_sync_read,
5364 .sync_write = smb2_sync_write,
5365 .query_dir_first = smb2_query_dir_first,
5366 .query_dir_next = smb2_query_dir_next,
5367 .close_dir = smb2_close_dir,
5368 .calc_smb_size = smb2_calc_size,
5369 .is_status_pending = smb2_is_status_pending,
5370 .is_session_expired = smb2_is_session_expired,
5371 .oplock_response = smb2_oplock_response,
5372 .queryfs = smb2_queryfs,
5373 .mand_lock = smb2_mand_lock,
5374 .mand_unlock_range = smb2_unlock_range,
5375 .push_mand_locks = smb2_push_mandatory_locks,
5376 .get_lease_key = smb2_get_lease_key,
5377 .set_lease_key = smb2_set_lease_key,
5378 .new_lease_key = smb2_new_lease_key,
5379 .calc_signature = smb2_calc_signature,
5380 .is_read_op = smb21_is_read_op,
5381 .set_oplock_level = smb21_set_oplock_level,
5382 .create_lease_buf = smb2_create_lease_buf,
5383 .parse_lease_buf = smb2_parse_lease_buf,
5384 .copychunk_range = smb2_copychunk_range,
5385 .wp_retry_size = smb2_wp_retry_size,
5386 .dir_needs_close = smb2_dir_needs_close,
5387 .enum_snapshots = smb3_enum_snapshots,
5388 .notify = smb3_notify,
5389 .get_dfs_refer = smb2_get_dfs_refer,
5390 .select_sectype = smb2_select_sectype,
5391 #ifdef CONFIG_CIFS_XATTR
5392 .query_all_EAs = smb2_query_eas,
5393 .set_EA = smb2_set_ea,
5394 #endif /* CIFS_XATTR */
5395 .get_acl = get_smb2_acl,
5396 .get_acl_by_fid = get_smb2_acl_by_fid,
5397 .set_acl = set_smb2_acl,
5398 .next_header = smb2_next_header,
5399 .ioctl_query_info = smb2_ioctl_query_info,
5400 .make_node = smb2_make_node,
5401 .fiemap = smb3_fiemap,
5402 .llseek = smb3_llseek,
5403 .is_status_io_timeout = smb2_is_status_io_timeout,
5404 .is_network_name_deleted = smb2_is_network_name_deleted,
5405 };
5406
5407 struct smb_version_operations smb30_operations = {
5408 .compare_fids = smb2_compare_fids,
5409 .setup_request = smb2_setup_request,
5410 .setup_async_request = smb2_setup_async_request,
5411 .check_receive = smb2_check_receive,
5412 .add_credits = smb2_add_credits,
5413 .set_credits = smb2_set_credits,
5414 .get_credits_field = smb2_get_credits_field,
5415 .get_credits = smb2_get_credits,
5416 .wait_mtu_credits = smb2_wait_mtu_credits,
5417 .adjust_credits = smb2_adjust_credits,
5418 .get_next_mid = smb2_get_next_mid,
5419 .revert_current_mid = smb2_revert_current_mid,
5420 .read_data_offset = smb2_read_data_offset,
5421 .read_data_length = smb2_read_data_length,
5422 .map_error = map_smb2_to_linux_error,
5423 .find_mid = smb2_find_mid,
5424 .check_message = smb2_check_message,
5425 .dump_detail = smb2_dump_detail,
5426 .clear_stats = smb2_clear_stats,
5427 .print_stats = smb2_print_stats,
5428 .dump_share_caps = smb2_dump_share_caps,
5429 .is_oplock_break = smb2_is_valid_oplock_break,
5430 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5431 .downgrade_oplock = smb3_downgrade_oplock,
5432 .need_neg = smb2_need_neg,
5433 .negotiate = smb2_negotiate,
5434 .negotiate_wsize = smb3_negotiate_wsize,
5435 .negotiate_rsize = smb3_negotiate_rsize,
5436 .sess_setup = SMB2_sess_setup,
5437 .logoff = SMB2_logoff,
5438 .tree_connect = SMB2_tcon,
5439 .tree_disconnect = SMB2_tdis,
5440 .qfs_tcon = smb3_qfs_tcon,
5441 .is_path_accessible = smb2_is_path_accessible,
5442 .can_echo = smb2_can_echo,
5443 .echo = SMB2_echo,
5444 .query_path_info = smb2_query_path_info,
5445 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5446 .query_reparse_point = smb2_query_reparse_point,
5447 .get_srv_inum = smb2_get_srv_inum,
5448 .query_file_info = smb2_query_file_info,
5449 .set_path_size = smb2_set_path_size,
5450 .set_file_size = smb2_set_file_size,
5451 .set_file_info = smb2_set_file_info,
5452 .set_compression = smb2_set_compression,
5453 .mkdir = smb2_mkdir,
5454 .mkdir_setinfo = smb2_mkdir_setinfo,
5455 .rmdir = smb2_rmdir,
5456 .unlink = smb2_unlink,
5457 .rename = smb2_rename_path,
5458 .create_hardlink = smb2_create_hardlink,
5459 .parse_reparse_point = smb2_parse_reparse_point,
5460 .query_mf_symlink = smb3_query_mf_symlink,
5461 .create_mf_symlink = smb3_create_mf_symlink,
5462 .create_reparse_symlink = smb2_create_reparse_symlink,
5463 .open = smb2_open_file,
5464 .set_fid = smb2_set_fid,
5465 .close = smb2_close_file,
5466 .close_getattr = smb2_close_getattr,
5467 .flush = smb2_flush_file,
5468 .async_readv = smb2_async_readv,
5469 .async_writev = smb2_async_writev,
5470 .sync_read = smb2_sync_read,
5471 .sync_write = smb2_sync_write,
5472 .query_dir_first = smb2_query_dir_first,
5473 .query_dir_next = smb2_query_dir_next,
5474 .close_dir = smb2_close_dir,
5475 .calc_smb_size = smb2_calc_size,
5476 .is_status_pending = smb2_is_status_pending,
5477 .is_session_expired = smb2_is_session_expired,
5478 .oplock_response = smb2_oplock_response,
5479 .queryfs = smb2_queryfs,
5480 .mand_lock = smb2_mand_lock,
5481 .mand_unlock_range = smb2_unlock_range,
5482 .push_mand_locks = smb2_push_mandatory_locks,
5483 .get_lease_key = smb2_get_lease_key,
5484 .set_lease_key = smb2_set_lease_key,
5485 .new_lease_key = smb2_new_lease_key,
5486 .generate_signingkey = generate_smb30signingkey,
5487 .calc_signature = smb3_calc_signature,
5488 .set_integrity = smb3_set_integrity,
5489 .is_read_op = smb21_is_read_op,
5490 .set_oplock_level = smb3_set_oplock_level,
5491 .create_lease_buf = smb3_create_lease_buf,
5492 .parse_lease_buf = smb3_parse_lease_buf,
5493 .copychunk_range = smb2_copychunk_range,
5494 .duplicate_extents = smb2_duplicate_extents,
5495 .validate_negotiate = smb3_validate_negotiate,
5496 .wp_retry_size = smb2_wp_retry_size,
5497 .dir_needs_close = smb2_dir_needs_close,
5498 .fallocate = smb3_fallocate,
5499 .enum_snapshots = smb3_enum_snapshots,
5500 .notify = smb3_notify,
5501 .init_transform_rq = smb3_init_transform_rq,
5502 .is_transform_hdr = smb3_is_transform_hdr,
5503 .receive_transform = smb3_receive_transform,
5504 .get_dfs_refer = smb2_get_dfs_refer,
5505 .select_sectype = smb2_select_sectype,
5506 #ifdef CONFIG_CIFS_XATTR
5507 .query_all_EAs = smb2_query_eas,
5508 .set_EA = smb2_set_ea,
5509 #endif /* CIFS_XATTR */
5510 .get_acl = get_smb2_acl,
5511 .get_acl_by_fid = get_smb2_acl_by_fid,
5512 .set_acl = set_smb2_acl,
5513 .next_header = smb2_next_header,
5514 .ioctl_query_info = smb2_ioctl_query_info,
5515 .make_node = smb2_make_node,
5516 .fiemap = smb3_fiemap,
5517 .llseek = smb3_llseek,
5518 .is_status_io_timeout = smb2_is_status_io_timeout,
5519 .is_network_name_deleted = smb2_is_network_name_deleted,
5520 };
5521
5522 struct smb_version_operations smb311_operations = {
5523 .compare_fids = smb2_compare_fids,
5524 .setup_request = smb2_setup_request,
5525 .setup_async_request = smb2_setup_async_request,
5526 .check_receive = smb2_check_receive,
5527 .add_credits = smb2_add_credits,
5528 .set_credits = smb2_set_credits,
5529 .get_credits_field = smb2_get_credits_field,
5530 .get_credits = smb2_get_credits,
5531 .wait_mtu_credits = smb2_wait_mtu_credits,
5532 .adjust_credits = smb2_adjust_credits,
5533 .get_next_mid = smb2_get_next_mid,
5534 .revert_current_mid = smb2_revert_current_mid,
5535 .read_data_offset = smb2_read_data_offset,
5536 .read_data_length = smb2_read_data_length,
5537 .map_error = map_smb2_to_linux_error,
5538 .find_mid = smb2_find_mid,
5539 .check_message = smb2_check_message,
5540 .dump_detail = smb2_dump_detail,
5541 .clear_stats = smb2_clear_stats,
5542 .print_stats = smb2_print_stats,
5543 .dump_share_caps = smb2_dump_share_caps,
5544 .is_oplock_break = smb2_is_valid_oplock_break,
5545 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5546 .downgrade_oplock = smb3_downgrade_oplock,
5547 .need_neg = smb2_need_neg,
5548 .negotiate = smb2_negotiate,
5549 .negotiate_wsize = smb3_negotiate_wsize,
5550 .negotiate_rsize = smb3_negotiate_rsize,
5551 .sess_setup = SMB2_sess_setup,
5552 .logoff = SMB2_logoff,
5553 .tree_connect = SMB2_tcon,
5554 .tree_disconnect = SMB2_tdis,
5555 .qfs_tcon = smb3_qfs_tcon,
5556 .is_path_accessible = smb2_is_path_accessible,
5557 .can_echo = smb2_can_echo,
5558 .echo = SMB2_echo,
5559 .query_path_info = smb2_query_path_info,
5560 .query_reparse_point = smb2_query_reparse_point,
5561 .get_srv_inum = smb2_get_srv_inum,
5562 .query_file_info = smb2_query_file_info,
5563 .set_path_size = smb2_set_path_size,
5564 .set_file_size = smb2_set_file_size,
5565 .set_file_info = smb2_set_file_info,
5566 .set_compression = smb2_set_compression,
5567 .mkdir = smb2_mkdir,
5568 .mkdir_setinfo = smb2_mkdir_setinfo,
5569 .posix_mkdir = smb311_posix_mkdir,
5570 .rmdir = smb2_rmdir,
5571 .unlink = smb2_unlink,
5572 .rename = smb2_rename_path,
5573 .create_hardlink = smb2_create_hardlink,
5574 .parse_reparse_point = smb2_parse_reparse_point,
5575 .query_mf_symlink = smb3_query_mf_symlink,
5576 .create_mf_symlink = smb3_create_mf_symlink,
5577 .create_reparse_symlink = smb2_create_reparse_symlink,
5578 .open = smb2_open_file,
5579 .set_fid = smb2_set_fid,
5580 .close = smb2_close_file,
5581 .close_getattr = smb2_close_getattr,
5582 .flush = smb2_flush_file,
5583 .async_readv = smb2_async_readv,
5584 .async_writev = smb2_async_writev,
5585 .sync_read = smb2_sync_read,
5586 .sync_write = smb2_sync_write,
5587 .query_dir_first = smb2_query_dir_first,
5588 .query_dir_next = smb2_query_dir_next,
5589 .close_dir = smb2_close_dir,
5590 .calc_smb_size = smb2_calc_size,
5591 .is_status_pending = smb2_is_status_pending,
5592 .is_session_expired = smb2_is_session_expired,
5593 .oplock_response = smb2_oplock_response,
5594 .queryfs = smb311_queryfs,
5595 .mand_lock = smb2_mand_lock,
5596 .mand_unlock_range = smb2_unlock_range,
5597 .push_mand_locks = smb2_push_mandatory_locks,
5598 .get_lease_key = smb2_get_lease_key,
5599 .set_lease_key = smb2_set_lease_key,
5600 .new_lease_key = smb2_new_lease_key,
5601 .generate_signingkey = generate_smb311signingkey,
5602 .calc_signature = smb3_calc_signature,
5603 .set_integrity = smb3_set_integrity,
5604 .is_read_op = smb21_is_read_op,
5605 .set_oplock_level = smb3_set_oplock_level,
5606 .create_lease_buf = smb3_create_lease_buf,
5607 .parse_lease_buf = smb3_parse_lease_buf,
5608 .copychunk_range = smb2_copychunk_range,
5609 .duplicate_extents = smb2_duplicate_extents,
5610 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5611 .wp_retry_size = smb2_wp_retry_size,
5612 .dir_needs_close = smb2_dir_needs_close,
5613 .fallocate = smb3_fallocate,
5614 .enum_snapshots = smb3_enum_snapshots,
5615 .notify = smb3_notify,
5616 .init_transform_rq = smb3_init_transform_rq,
5617 .is_transform_hdr = smb3_is_transform_hdr,
5618 .receive_transform = smb3_receive_transform,
5619 .get_dfs_refer = smb2_get_dfs_refer,
5620 .select_sectype = smb2_select_sectype,
5621 #ifdef CONFIG_CIFS_XATTR
5622 .query_all_EAs = smb2_query_eas,
5623 .set_EA = smb2_set_ea,
5624 #endif /* CIFS_XATTR */
5625 .get_acl = get_smb2_acl,
5626 .get_acl_by_fid = get_smb2_acl_by_fid,
5627 .set_acl = set_smb2_acl,
5628 .next_header = smb2_next_header,
5629 .ioctl_query_info = smb2_ioctl_query_info,
5630 .make_node = smb2_make_node,
5631 .fiemap = smb3_fiemap,
5632 .llseek = smb3_llseek,
5633 .is_status_io_timeout = smb2_is_status_io_timeout,
5634 .is_network_name_deleted = smb2_is_network_name_deleted,
5635 };
5636
5637 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5638 struct smb_version_values smb20_values = {
5639 .version_string = SMB20_VERSION_STRING,
5640 .protocol_id = SMB20_PROT_ID,
5641 .req_capabilities = 0, /* MBZ */
5642 .large_lock_type = 0,
5643 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5644 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5645 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5646 .header_size = sizeof(struct smb2_hdr),
5647 .header_preamble_size = 0,
5648 .max_header_size = MAX_SMB2_HDR_SIZE,
5649 .read_rsp_size = sizeof(struct smb2_read_rsp),
5650 .lock_cmd = SMB2_LOCK,
5651 .cap_unix = 0,
5652 .cap_nt_find = SMB2_NT_FIND,
5653 .cap_large_files = SMB2_LARGE_FILES,
5654 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5655 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5656 .create_lease_size = sizeof(struct create_lease),
5657 };
5658 #endif /* ALLOW_INSECURE_LEGACY */
5659
5660 struct smb_version_values smb21_values = {
5661 .version_string = SMB21_VERSION_STRING,
5662 .protocol_id = SMB21_PROT_ID,
5663 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5664 .large_lock_type = 0,
5665 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5666 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5667 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5668 .header_size = sizeof(struct smb2_hdr),
5669 .header_preamble_size = 0,
5670 .max_header_size = MAX_SMB2_HDR_SIZE,
5671 .read_rsp_size = sizeof(struct smb2_read_rsp),
5672 .lock_cmd = SMB2_LOCK,
5673 .cap_unix = 0,
5674 .cap_nt_find = SMB2_NT_FIND,
5675 .cap_large_files = SMB2_LARGE_FILES,
5676 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5677 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5678 .create_lease_size = sizeof(struct create_lease),
5679 };
5680
5681 struct smb_version_values smb3any_values = {
5682 .version_string = SMB3ANY_VERSION_STRING,
5683 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5684 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5685 .large_lock_type = 0,
5686 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5687 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5688 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5689 .header_size = sizeof(struct smb2_hdr),
5690 .header_preamble_size = 0,
5691 .max_header_size = MAX_SMB2_HDR_SIZE,
5692 .read_rsp_size = sizeof(struct smb2_read_rsp),
5693 .lock_cmd = SMB2_LOCK,
5694 .cap_unix = 0,
5695 .cap_nt_find = SMB2_NT_FIND,
5696 .cap_large_files = SMB2_LARGE_FILES,
5697 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5698 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5699 .create_lease_size = sizeof(struct create_lease_v2),
5700 };
5701
5702 struct smb_version_values smbdefault_values = {
5703 .version_string = SMBDEFAULT_VERSION_STRING,
5704 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5705 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5706 .large_lock_type = 0,
5707 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5708 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5709 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5710 .header_size = sizeof(struct smb2_hdr),
5711 .header_preamble_size = 0,
5712 .max_header_size = MAX_SMB2_HDR_SIZE,
5713 .read_rsp_size = sizeof(struct smb2_read_rsp),
5714 .lock_cmd = SMB2_LOCK,
5715 .cap_unix = 0,
5716 .cap_nt_find = SMB2_NT_FIND,
5717 .cap_large_files = SMB2_LARGE_FILES,
5718 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5719 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5720 .create_lease_size = sizeof(struct create_lease_v2),
5721 };
5722
5723 struct smb_version_values smb30_values = {
5724 .version_string = SMB30_VERSION_STRING,
5725 .protocol_id = SMB30_PROT_ID,
5726 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5727 .large_lock_type = 0,
5728 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5729 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5730 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5731 .header_size = sizeof(struct smb2_hdr),
5732 .header_preamble_size = 0,
5733 .max_header_size = MAX_SMB2_HDR_SIZE,
5734 .read_rsp_size = sizeof(struct smb2_read_rsp),
5735 .lock_cmd = SMB2_LOCK,
5736 .cap_unix = 0,
5737 .cap_nt_find = SMB2_NT_FIND,
5738 .cap_large_files = SMB2_LARGE_FILES,
5739 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5740 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5741 .create_lease_size = sizeof(struct create_lease_v2),
5742 };
5743
5744 struct smb_version_values smb302_values = {
5745 .version_string = SMB302_VERSION_STRING,
5746 .protocol_id = SMB302_PROT_ID,
5747 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5748 .large_lock_type = 0,
5749 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5750 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5751 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5752 .header_size = sizeof(struct smb2_hdr),
5753 .header_preamble_size = 0,
5754 .max_header_size = MAX_SMB2_HDR_SIZE,
5755 .read_rsp_size = sizeof(struct smb2_read_rsp),
5756 .lock_cmd = SMB2_LOCK,
5757 .cap_unix = 0,
5758 .cap_nt_find = SMB2_NT_FIND,
5759 .cap_large_files = SMB2_LARGE_FILES,
5760 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5761 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5762 .create_lease_size = sizeof(struct create_lease_v2),
5763 };
5764
5765 struct smb_version_values smb311_values = {
5766 .version_string = SMB311_VERSION_STRING,
5767 .protocol_id = SMB311_PROT_ID,
5768 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5769 .large_lock_type = 0,
5770 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5771 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5772 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5773 .header_size = sizeof(struct smb2_hdr),
5774 .header_preamble_size = 0,
5775 .max_header_size = MAX_SMB2_HDR_SIZE,
5776 .read_rsp_size = sizeof(struct smb2_read_rsp),
5777 .lock_cmd = SMB2_LOCK,
5778 .cap_unix = 0,
5779 .cap_nt_find = SMB2_NT_FIND,
5780 .cap_large_files = SMB2_LARGE_FILES,
5781 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5782 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5783 .create_lease_size = sizeof(struct create_lease_v2),
5784 };
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